Isabella Garcia-Shapiro

Isabella Garcia-Shapiro is the neighbor and best friend of Phineas Flynn and Ferb Fletcher. She lives in Danville on Maple Drive, across from Phineas and Ferb's house, with her mother, Vivian Garcia-Shapiro. She has a huge crush on Phineas (though he doesn't seem to notice it) and spends most of her days participating or helping with his and Ferb's projects. She also spends time trying to earn Fireside Girls patches. She is also great friends with the members of her troop in the Fireside Girls.

1st Dimension
Isabella Garcia-Shapiro was born of a Hispanic mother and a Jewish-American father. At some point in her life, she met and befriended Phineas and Ferb (with the former becoming her crush). She also joined the local troop of Fireside Girls, and became the troop leader.

Isabella lives in Danville on Maple Drive, across from Phineas and Ferb with her mother, Vivian Garcia-Shapiro. She spends most of her days participating or helping with their many projects. She also spends time caring for her dog Pinky or trying to earn Fireside Girls patches. She is also great friends with the members of her Fireside Girls troop, Gretchen, Milly, Ginger, Katie, Holly, and Adyson.

2nd Dimension
2nd Dimension Isabella's past life prior to Across the 2nd Dimension is unrevealed, other than she somehow became a member of The Resistance, worked her way up the ranks, and eventually became the second-in-command as well as the leader of the Firestorm Girls branch, specifically troop 246231. She is also assumed to have been born from Mexican and Jewish roots, like her 1st Dimension self.

Personality
Isabella is happy, fearless, quick-thinking, sweet, optimistic, caring, friendly and spirited, eager to help with any of Phineas and Ferb's Big Ideas. Most of the time it's for patches, or simply because she has a crush on Phineas. She is mostly optimistic, but she also cares for, and worries about people at times. This is shown when she is empathetic towards Candace having problems asking Jeremy out. ("Out to Launch") She also helped bring Baljeet and Buford out of a state of hypnotic dullness. ("Phineas and Ferb Interrupted") Being the leader of Fireside Girls 46231, she has fantastic leadership and organizational abilities, though she'll follow Phineas' orders as well. She is also a jealous person, and gets frustrated at some "thing" or someone that Phineas gives a lot of attention ("The Chronicles of Meap", "That Sinking Feeling", "Phineas and Ferb Summer Belongs to You!"). She also didn't like how Melissa showed more interest in Candace than her ("We Call it Maze") and was visibly angry when Suzy and Candace repeated her trademark "whatcha doin'?" ("Suddenly Suzy"). Isabella has shown at least twice that she has a devious streak, taking advantage of a situation for her own benefit. These instances include her immediately jumping on Baljeet's wager of squid versus Buford ("Voyage to the Bottom of Buford"). She also buys a play with the carny Shady Joe when a bowling ball Phineas and Ferb built knocks down all the pins (along with the stand), although Shady Joe is cheating by having the pins taped onto the shelf ("Bowl-R-Ama Drama").

1st Dimension
Isabella is a slender child with long black hair and oval blue eyes. She wears a pink sleeveless dress that stops above her knees, revealing that she has long legs, like Ferb, with a white short-sleeve T-shirt underneath and a purple belt, white socks and pink shoes. The pink bow in her hair is thought to be her trademark, and she has only been seen without it on a few occasions (see background information below). Her Fireside Girls uniform is the same format as her normal clothing, but with an orange sleeveless top, a white shirt exactly like her normal outfit, and a short brown skirt. She wears an orange beret with a red bow in the front. Her belt is red, and she has an accomplishment sash with it. She has white socks and red shoes with this outfit. For winter, she wears a purple hat, purple bow, purple coat, purple scarf (loose wrap), purple mitten, and white boots. She also has two other winter outfits: One of them, as seen in the song S'Winter, is a purple fleece jacket, a pink miniskirt and pink shoes and her white socks, and in the book "Oh Christmas Tree!", she wears a pink bow, a pink jacket, a white skirt, pink legwarmers, and white shoes, and her pajamas have purple stripes and wears a purple bow. She also wears pink mittens and a pink/white earwarmer with this outfit. In most episodes she appears in, she is slightly taller than Phineas, but in a select few episodes, she is the same height or actually slightly shorter than Phineas.

2nd Dimension
2nd Dimension Isabella is physically identical to her 1st Dimension counterpart, although her eyes are slightly more oval-shaped due to her serious personality. She has only been seen in a silver shirt with torn sleeves, black pants with diamond-shaped silver patches on the portion that covers her kneecaps, black shoes, gray gloves, a dark-green beret, a brown strap holding what appears to be rolled-up strips of paper, and a tan badge with a green circle at the center, with a red lightning-bolt insignia running across it (probably the Firestorm Girls symbol).

Phineas Flynn
Isabella has a huge crush on her neighbor/best friend Phineas. She has many romantic daydreams about him and also believes she will one day marry him, but she gеts angry if he does not notice her or is oblivious to her hints, which is generally whenever she acts romantically around him ("Phineas and Ferb's Quantum Boogaloo", "Isabella and the Temple of Sap", "Out to Launch", "Comet Kermillian", "Candace's Big Day", etc.). She cutely greets him with the phrase "Whatcha doin'?" She has even directly referred to Phineas as "The very thing she lives for." ("Isabella and the Temple of Sap") Also, Isabella revealed in the song Whatcha Doin' that she is always dying to come over to his house to see him and ask 'Whatcha Doin'?' and that she specifically says it to Phineas and not Ferb. Isabella swoons for "The Beak" many times during "The Beak's Theme Song", not realizing that it was still Phineas she was swooning for. One example of this is when Isabella and Phineas were alone in Paris looking for parts, and Isabella was trying to be romantic, but Phineas seemed very oblivious to her. Then when the boat crash landed on the deserted island and Phineas tried to find something to fix the boat, Isabella began crying because Phineas didn't even take notice of her and she would have given anything for Phineas to sit down next to her and enjoy the sunset. Then Phineas ran up next to her, having a small mental breakdown, desperately thinking of an idea to get off of the island. Figuring that none of the ideas would work, he gave up hope entirely and sat down with Isabella to enjoy the sunset with her. Seeing how broken Phineas was, Isabella realized that this wasn't the amazing kid she had fallen in love with, so she gave him a pep talk, and almost admitting her love for him in the process, but she quickly caught herself and said something else. She then mentioned Ferb's map and Phineas thanked her for the inspiration with a hug, leaving her in a trance. Later when they make it back to Danville, Isabella hugs Phineas for regaining his confidence to achieve his goal. Not even 30 seconds later they sing a duet (Summer Belongs to You!) with Phineas taking her hand several times and also showing several signs that he returns her feelings for him ("Phineas and Ferb: Summer Belongs To You!"). However, when Phineas constructs a device to find cute things to search for Meap, he says he had took Isabella's cuteness into account and adjusted the settings accordingly ("The Chronicles of Meap"). When he puts the settings back to normal, the device overloads from an excessively strong cute signal from her. She uses her position as Fireside Girls troop leader to stay near him and participate in his Big Ideas, under the guise of earning "Help Thy Neighbor" patches. It is unsure whether Phineas has the same feelings towards Isabella, but mostly he seems oblivious. Phineas feels bad about ditching her, and also says that he cannot tell her he is The Beak because she is "close to him" ("The Beak"). Also, when Isabella tells Phineas he is brave, he replies with, "You were too!" She learns that she will be an aunt to Candace's children. Although who she married was unknown, it will likely be Phineas, since Phineas is now being shown returning Isabella's feelings. She sometimes disguises her affection for him (but very rarely) like hugging him in a crowd when everyone is hugging Perry, Isabella hugs Phineas instead ("Oh, There You Are, Perry"). In "The Great Indoors", Phineas helps Isabella get patches after rain spoils her plans to get them, which had made her sad. The rain was caused by Heinz Doofenshmirtz's Rain-inator. In "Canderemy", Isabella wanted Phineas to go to a sold-out Stumbleberry Finklebat movie, but Phineas interrupted her so he could finish his robo-dog (as seen in the short version of Today is Gonna Be a Great Day). At the end Phineas goes with her, but with Ferb combined with him from Heinz Doofenshmirtz's Combine-inator.). While on hot air balloons, Isabella's balloon is behind Phineas's. Isabella asks him what he's doing, seeing him fidgeting with something on his balloon. He explains that his wheel is broken, but he stops talking because he heard something behind him. He turns around to see Isabella, who asked if he needs help fixing it. Phineas replied, asking her to hold the wheel still. Isabella immediately jumps on the opportunity and holds the wheel still, obviously overjoyed that she can put her arms around Phineas. Phineas didn't seem to mind, and replied by saying she is holding it perfectly, partially hinting that he likes having her arms around him. Isabella smiled and they stay in the same balloon together for the rest of the ride ("Last Train to Bustville"). On Phineas' birthday, Isabella helps create a digital video for his birthday. She created some digital editing voices for herself when Phineas' quoting: "We´ll be together forever Isabella" and "Isabella, will you marry me?". Later that day, Phineas stateed that he enjoyed being around the people he loves. While he says this, a tear runs down Isabella. This may mean that Phineas may like her now as more than a friend. ("Phineas' Birthday Clip-O-Rama!")

Phineas explains that the teleport function of his and Ferb's prototype cellphone, built for Candace, will "take you to the place or person you're trying to reach." He demonstrates this by asking Isabella to stand on the driveway, to which she willingly agrees. Phineas specifies Isabella's name to the phone ("Go to: Isabella"), and is transported directly beside her - so close, in fact, their noses touch. Isabella asks Phineas what he's doing ("Hey, Phineas. Whatcha doin'?"), to which Phineas responds "I'm transporting!" Neither flinch, pull their noses away, or appear flustered throughout the exchange. Isabella seems very pleased with the close contact - that is, until Phineas transports back to the garage and she angrily replies with a "Dang it!" ("Candace Disconnected"). As the song Aerial Area Rug starts, Phineas reaches out for Isabella's hand to help her onto the flying carpet. They are also seen looking into each other's eyes, lying down close to each other, or just sitting down together away from everyone else throughout the duration of the song. ("Magic Carpet Ride")

Near the end of the movie, Carl is going to wipe the memories of everyone who found out that Perry was a secret agent using a machine called the "amnesia-inator". Isabella asks Major Monogram if the machine would make them forget everything that happened that day, he assures her of it, and she kisses Phineas. She then tells Carl to fire up the machine, much to the dissatisfaction of Phineas, who proceeds to cry out "Wait, wait, WAIT", showing that he didn't want to forget that moment, and that he may have feelings for Isabella after all and that would also mean that Phineas would have preferred to remember the kiss than lose Perry.

Ferb Fletcher
Isabella is good friends with Ferb, likely because he is the stepbrother of her crush, although she seems to get annoyed when Ferb goes wherever Phineas does. Along with Candace, she has outright stated that Ferb is Phineas' stepbrother ("Rollercoaster"). Unlike her relationship with Phineas, Isabella shows no romantic interest in Ferb. However, after time-traveling to the future, she learned that she might marry Phineas or Ferb ("Phineas and Ferb's Quantum Boogaloo"). Upon this discovery, Ferb turned around and winked at Isabella, who was very stunned at the possibility that she may marry someone else other than Phineas. This may indicate that Ferb may harbor a bit of affection for Isabella, or that Ferb just fancies himself a ladies' man ("Thaddeus and Thor"). It is also possible he was simply teasing her. Ferb is slightly irritated when Phineas gets all of Isabella's attention and praise for being a superhero ("The Beak") or it can be just the thought of him being the one who controls the lower half and Phineas gets all the attention. When they were stranded on the island, Ferb listened while Isabella talked about Phineas not noticing her, and offered her a handkerchief when she started crying, and Isabella thanked him. He knows about Isabella's crush on Phineas. ("Phineas and Ferb Summer Belongs to You!"). But it is most likely that he does not have a affection for Isabella since he has more affection to Vanessa Doofenshmirtz ("I Scream, You Scream").

Baljeet
Isabella is friends with Baljeet. They hang out on occasion, usually when they are brought together by Phineas and Ferb's Big Ideas. She won a bet against him on who would win the fight between Buford and the squid ("Voyage to the Bottom of Buford"). Though when trying to find the purpose of a machine Baljeet did jump at the chance to have a romantic dinner with Isabella, even a staged one. Isabella told him he ran at the table ("What Do It Do?"). This is also hinted when Baljeet asked Isabella if he made a good Phineas, she responds with "No, no you weren't." ("Not Phineas and Ferb"). When Phineas and Ferb built a super computer, Isabella is seen thinking about Phineas on the super computer. This makes Baljeet mad, showing he may have a crush on her ("Ask a Foolish Question").

Buford Van Stomm
When they play sports or games, Buford usually mocks her for being a girl, and therefore less of a competitor in his eyes. Isabella takes this very seriously and refuses to let Buford beat her ("Got Game?", "Brain Drain"). When she saw Buford crying about his lost goldfish, she expressed concern and worry about him ("Voyage to the Bottom of Buford"). She also stood up to the video-game boss (designed in Buford's image), and defeated him after he threatened Phineas ("Gaming the System"), though technically this was not the real Buford.

Candace Flynn
Isabella and Candace are good friends. They both know about each others' respective crushes and share advice and experiences at times ("One Good Scare Ought to Do It!", "Out to Launch", "Phineas and Ferb's Quantum Boogaloo", "Phineas and Ferb-Busters!", "Phineas and Ferb Summer Belongs to You!"). While in Paris, Isabella felt jealous of Candace's relationship with Jeremy since Isabella didn't get hers ("Phineas and Ferb: Summer Belongs To You!"). When Isabella excitedly realized that Candace's future daughter called her "Aunt Isabella", meaning that she married into the Flynn-Fletcher family, Candace reminds her that she could marry either Phineas or Ferb as a counterbalance ("Phineas and Ferb's Quantum Boogaloo"). Candace teamed up with Isabella to beat Buford and Baljeet ("Got Game?"). Isabella also helped Candace get a ticket to the Paisley Sideburn Brothers Concert ("Fireside Girl Jamboree"). Even though they like each other in general, Isabella was mad at Candace when Melissa was more interested in Candace's achievements than Isabella's, yet they became reconciled when Candace admitted that if it had not been for Isabella, she would have never gained 50 Accomplishment Patches in a single day ("We Call it Maze"). Interestingly, Candace doesn't try to bust Isabella in Not Phineas and Ferb, even though she acknowleged that Isabella was in the backyard. This may mean that they are very good firends. In a future episode, revealed during a talk session with some of the Phineas and Ferb cast on July 9, 2011 in New York City, Isabella will ask Candace for romantic advice.

Fireside Girls
As the troop's leader, the Fireside Girls always follow Isabella's orders, always ready, and willing to do whatever it takes to help their leader in helping Phineas and Ferb, even risking themselves to do it, like driving a van to get sap ("Isabella and the Temple of Sap"). Although the girls are loyal to Isabella, and have earned many badges in helping the boys, they have voiced that they've collected more than fifty of the 'helping thy neighbor' badge because of it. They're also aware of Isabella's crush on Phineas and her desire to marry him, and they jokingly tease her for it ("Isabella and the Temple of Sap"). Even so, they remain friends with the boys and squealed with delight when Phineas invited Isabella on a romantic cruise ("That Sinking Feeling"). Also, Gretchen sometimes reminds her of what they were going to do when the troop needed to get sap from a rare tree so the troop can earn their "Sap Collecting Patches"("Isabella and the Temple of Sap").

Jeremy Johnson
Jeremy seems to like Isabella's idea in "Got Game?" about Candace being on Isabella's team. He also called her Miss when he wanted a table for him and Candace in "Chez Platypus".

Stacy Hirano
Not much is known about their relationship, but Isabella knows what Stacy and Candace were going to do one day. ("Spa Day") She also knows her name. ("Rollercoaster: The Musical!")

Heinz Doofenshmirtz
Even though they are rarely seen at the same time, Isaabella directed him and his evil date to a table in "Chez Platypus". In "Wizard of Odd", Doofen witch Warlock wanted the boots from a crushed Suzy Johnson that were on Candace, but Isabella (as the Good Witch) said he had no control in the area has was in.

Perry the Platypus
Isabella petted Perry in "Rollercoaster", saying that Phineas and Ferb could teach her some tricks. She also sang Come Home, Perry with the boys, suggesting she likes him as well, even though she has Pinky as a pet. ("Oh, There You Are, Perry") She petted Perry again in "Phineas and Ferb The Movie: Across The 2nd Dimension]]" while hitting a birdie off of him.

Pinky the Chihuahua
Isabella likes Pinky and feeds him grilled cheese, but he, like most other dogs will run after cats ("Journey to the Center of Candace"). Isabella also seems to have given him some orders to him as he almost ate Candace, but Isabella told him to stop, which Pinky did.("Hide and Seek") She also took him to the Fireside Girls clubhouse one day, but he left since he was an O.W.C.A. agent. ("Isabella and the Temple of Sap") Except for the cameo in "Rollercoaster: The Musical!", Pinky has not been seen since.

Irving
Isabella was orginally neutral to Irving, but as of "Phineas' Birthday Clip-O-Rama!", she seems to be more of a friend to him. In "Mispercieved Montreme", he thinks Isabella is cute.

Jenny
Jenny doesn't appear as often as the other characters do, but Isabella seems to know knows her name ("Rollercoaster: The Musical!").

Mitch
Isabella seems to be a enemy to him, since he is a poacher and she thinks that is wrong. ("The Chronicles of Meap")

Firestorm Girls
Just like the 1st Dimension Isabella's relationship with the Fireside Girls, the Firestorm Girls always follow Isabella's orders and are always reading and willing to aid their leader, even risking themselves in order to allow the process to be carried out.

Candace Flynn
According to the Phineas and Ferb The Movie Magazine, Candace holds a special trust in Isabella, though this is never a subject in the film itself.

Buford Van Stomm
When she spots Buford with Phineas, Ferb, and their 2nd Dimension selves, she expresses disgust towards him and said to him, "...What do you want? I thought you were resisting us?" This makes it evident that she was affected in some way by Buford's departure from The Resistance.

Ferb Fletcher
In Phineas and Ferb The Movie Game: The Dimension of Doooom!, it is shown that she holds affection for Ferb, but this is never confirmed in the film itself.

Phineas Flynn
At first she did not like him, but however she may have feelings for him, because in the Phineas and Ferb Across the 2nd Dimension video game, she blushed when Phineas complimented her idea about the Ninja glove.

Take Two with Phineas and Ferb
In this live-action/animated spinoff of Phineas and Ferb, Isabella is a stage manager and in some episodes is seen only once, but unlike the show she was first in, she has been seen in every episode so far. Some other times, she is helping out such as getting a soccer ball to a guest and screaming with the others. In the Howie Mandel episode, she accidently broke a window while trying to get a baton to him.

Phineas and Ferb: Across the 2nd Dimension
In this upcoming Disney Channel Original Movie, Isabella is seen helping Phineas and Ferb get a birdie on a platypus-themed big idea, and it gets the boys to Heinz Doofenshmirtz's building. Later she is seen in her Alternate form, where she wears a grey beret, a grey bow, a grey pleated shirt, black pants, and black shoes while she talks to Regular Phineas. From the 2nd Dimension site: "If you've ever spent much time in Phineas and Ferb's backyard, chances are you've heard Isabella arrive and say "whatcha' doin?" Leader of the Fireside Girls, Isabella uses her resourcefulness to help the boys complete some of their larger inventions." "Isabella, the sassy and fashionable member of The Resistance spends her time resisting evil in the 2nd Dimension." The regular Isabella also spends some time in the the 2nd Dimension and destroys a robot using the horse she rode in "Ain't No Kiddie Ride" and also does a sommersault below a robot while having a weapon in her hands. Meanwhile, the 2nd Dimension complains about finally being fashionable. She and the Firestorm Girls are around 2nd Dimension Heinz while the boys are tied up. At the end of the movie, Isabella kisses Phineas, knowing that their memories will be erased thereafter. Phineas's response to the sudden, startling kiss turns out to be very intriguing: he instantly exclaims, "Isabella!" with a smile on his face, and once Isabella gives the OK for the day to be forgotten, he cries out, "Wait, wait, WAIT"- just as the amnesia-inator's ray hits them. The fact that his immediate reaction would be so pleasant hints that he has now just considered returning Isabella's affections. Also, his next step of action was to beg for the memory-erasing to be cancelled, or at least stalled, making it clear that he wanted to say (or do) something very important according to him. Something else to take into account is that Phineas had just agreed to sacrifice remembering the "best day ever" so that Perry could remain his pet. If he was about to request for their memories NOT to be erased, then in that split second, he was viewing his relationship with Isabella as more important than Perry's secret. Also interesting: if he wasn't considering to remember the whole day, but at least keep this one memory, then it is technical proof that Phineas does want to be "more than just friends" with Isabella and wants to form a real relationship. However, since the entire day was in fact erased from their memories, then it is unknown whether Isabella's kiss sprung open these feelings inside Phineas, or if these feelings are already laying in him, albeit being dormant/undiscovered.

Background Information

 * There is plenty of evidence that Isabella is at least part Jewish. Her last name is Shapiro, traditionally a Jewish name. She has a mirror in her room that has a Star of David frame; this is a common symbol for Judaism. In addition, Isabella's mother, Vivian Garcia-Shapiro, went to a Mexican-Jewish Cultural Festival and often uses Yiddish phrases. Isabella says she celebrates Hanukkah instead of Christmas ("Isabella and the Temple of Sap", "Picture This", "Phineas and Ferb Christmas Vacation!”, "Phineas' Birthday Clip-O-Rama!
 * Isabella is an excellent singer ("S'Winter", "The Magnificent Few", "The Ballad of Badbeard", "Phineas and Ferb Summer Belongs to You!", "Wizard of Odd", and in several other episodes). Also in several of the songs, you can hear her singing alone. ("Where Did We Go Wrong?", "City of Love", "We Wish You A Merry Christmas", etc.)
 * Isabella appeared as the good witch in "Wizard of Odd." During that episode, she wore a pink dress with a pink tiara and wand. She traveled through a floating eyeball as the good witch and her friends were the Patchkins.
 * She can whistle with two fingers ("S'Winter").
 * She's good at table football ("Got Game?").
 * The character is named after series creator Dan Povenmire's oldest daughter who loves the show and enjoys that Isabella is named for her.
 * Isabella owns roller skates ("Bowl-R-Ama Drama").
 * Isabella has a pool in her backyard ("Rollercoaster", "Ready for the Bettys", "Day of the Living Gelatin").
 * Isabella has a Chihuahua named Pinky who is revealed to be a secret agent in the O.W.C.A. like Perry ("Journey to the Center of Candace", "Comet Kermillian", "Interview With a Platypus", "Day of the Living Gelatin", "Hide and Seek", "Isabella and the Temple of Sap", "Rollercoaster: The Muscial!").
 * Isabella could be descended from a girl that looks exactly like her, who was friends with Dr. Phineastein and Ferbgor and had a picnic with the boy's big idea, a platypus monster (“The Monster of Phineas-n-Ferbenstein”).
 * Isabella can play the tambourine, ("The Fast and the Phineas", "Don't Even Blink" and others) the trumpet, ("Don't Even Blink") the guitar and the key-tar ("Tip of the Day", "Gaming the System", "Oh, There You Are, Perry" and in other episodes).
 * Her mother, Vivian Garcia-Shapiro calls her "Isa" for short. This is a common shortening of her name in many Spanish-speaking countries ("Hide and Seek").
 * Her signature look and her Fireside Girl uniform switch on occasion ("Flop Starz", "The Fast and the Phineas", "Candace Loses Her Head", "The Flying Fishmonger", "At the Car Wash", "Candace's Big Day", "Robot Rodeo").
 * She is the leader of Fireside Girls Troop 46231 ("Isabella and the Temple of Sap").
 * She is able to tell when someone else says her catchphrase, "Whatcha doin'?", even when she is not near the person. She gets very upset if someone says it except for Phineas, ("I Scream, You Scream", "At the Car Wash", "That Sinking Feeling") and she does not let anyone say it to Phineas ("Out of Toon", "Suddenly Suzy"). She also feels a disturbance whenever somebody else says it ("Phineas and Ferb Christmas Vacation!"). Baljeet says it once to Phineas, but Isabella was not around and he said, "I sounded just like Isabella" ("Bowl-R-Ama Drama"). Buford once tried using Isabella's phrase but Isabella elbowed him before he could finish ("Out of Toon") Likewise, Isabella is not stopped by Phineas when she says his catchphrases in episodes such as "The Chronicles of Meap", "Cheer Up Candace", and others.
 * She is the only one of Phineas and Ferb's main group of friends that hasn't been seen at a younger age yet.
 * She is strong as she is seen holding Phineas in her hands ("One Good Scare Ought to Do It!"), can actually hurt Buford (a very tough bully) just by elbowing him ("Out of Toon"), can lift a book that is much larger than her ("Fireside Girl Jamboree"), with Baljeet's help, lift the seats from the Sun-Beater 3000 onto the paper airplane and is seen breaking a pencil with only her fist, ("Phineas and Ferb Summer Belongs to You!"), and can lift a heavy processor without help and only she and Buford can lift it, while Baljeet just fell down.("Ask a Foolish Question")
 * Isabella knows how to drive a van ("Isabella and the Temple of Sap") and a jet ("Phineas and Ferb Christmas Vacation!"), but she agreed with Phineas that she was too young to drive ("The Secret of Success").
 * She is a very fast runner. ("Candace Loses Her Head", "Journey to the Center of Candace")
 * She knows a lot about cars and engines ("The Fast and the Phineas", "The Secret of Success").
 * She can use a much deeper voice, which can scare an unprepared listener ("It's a Mud, Mud, Mud, Mud World").
 * She can dance well, almost based on her voice actress ("Robot Rodeo"). She has also danced in "Put That Putter Away", "Day of the Living Gelatin", "Spa Day", "Fireside Girl Jamboree", and other episodes.
 * When her hair is exposed to humidity, it gets frizzy ("Robot Rodeo").
 * She seems to be obsessed by horses, especially brightly colored ones or unicorns ("The Magnificent Few", "Out of Toon", "Hail Doofania!", "Isabella and the Temple of Sap", "Ain't No Kiddie Ride").
 * She reads the newspaper (("Jerk De Soleil", "Phineas and Ferb Christmas Vacation!", "The Beak").
 * She has been seen without her bow on a few occasions: as a pirate in The Ballad of Badbeard, as a "ninja of love" in the performance of "You Snuck Your Way Right Into My Heart" ("Dude, We're Getting the Band Back Together"), in a horse costume ("Got Game?"), serving as a flight attendant ("De Plane! De Plane!"),wearing a fedora ("The Beak"), in foreign costume during the song "Bouncin' Around the World" as well wearing a beret in "City of Love" ("Phineas and Ferb Summer Belongs to You!") and playing the Good Witch in "Wizard of Odd", and her desert outfit in "The Great Indoors". There was one day where Isabella never wears her bow ("The Beak"). (Of course, it may be under her hat).
 * She gets jealous when all credit or attention is taken away from her. ("The Chronicles of Meap", "That Sinking Feeling", "We Call It Maze")
 * She has kind of a short temper. This was showed in various episodes including "Phineas and Ferb Summer Belongs to You!" when she broke her pencil out of anger.
 * She owns a Mindy doll. ("Picture This")
 * She was once a member of the Lil' Sparks and now tutoring Melissa. ("We Call it Maze")
 * In "The Chronicles of Meap" bonus disc, Dr. Doofenshmirtz thinks Isabella is full of herself but also cute.
 * She is most likely a Stumbleberry Finkbat. ("Canderemy")
 * The Shapiro part of her last name, in Hebrew, is שפירא.
 * She owns a "Quick E Bake Oven". ("No More Bunny Business").
 * She knows how to edit videos. ("Phineas' Birthday Clip-O-Rama!")
 * Isabella is a playable character in the video game version of Phineas and Ferb: Across the 2nd Dimension, which marked her first time that she is a playble character in the Phineas and Ferb video games.
 * She is clear-thinking when she is the middle of emergencies. She got everyone running for safety when Doofenschmirtz's Big Laundry experiment goes awry, saved Phineas from a fall by having the Fireside Girls bind their sashes together, and she did a water rescue and administers first aid in the biodome on Adyson. ("Swiss Family Phineas", "One Good Scare Ought to Do It!", "The Great Indoors")
 * She is business agent for Phineas and Ferb when they direct a movie. "Lights, Candace, Action!")
 * Isabella wears an outfit and bow similar to Helga Pataki of Nickelodeon's Hey Arnold!.
 * She has no eyebrows and is sensitive about it ("Learn to Draw Disney Phineas and Ferb"). One scene accidentally includes eyebrows ("Canderemy").
 * She is described as one of 2nd Dimension Candace's most trusted Resistance member (Phineas and Ferb The Movie Magazine).
 * She's usually fearleass, but did get frightned on some occasions ("One Good Scare Ought to Do It!", "Get That Bigfoot Outa My Face!", "Hide and Seek" and "The Lizard Whisperer").
 * She is the second child to kiss someone on screen. First was Baljeet. ("Phineas and Ferb Christmas Vacation!")

Songs Isabella has sung
Isabella has sung a number of songs in the series, with most of songs the coming in the start of season 2 onward. Also in many of those songs, she is usually singing at least one line by herself.
 * "Go, Go, Phineas" (with the Fireside Girls)
 * "In the Mall" (with Phineas Flynn)
 * "S'Winter" (With Adyson Sweetwater and Gretchen from the Fireside Girls)
 * "Gitchee Gitchee Goo" (With Adyson Sweetwater, Milly, Gretchen, Phineas, Ferb, and Candace)
 * "The Ballad of Badbeard" (with the Fireside Girls(except Katie))
 * "The Flyin' Fishmonger" (with the Fireside Girls [Except Ginger] and Phineas)
 * "Let's Go Digital" (with Baljeet and Buford)
 * "The Phintastic Ferbulous Car Wash" (with the Fireside Girls, Phineas, Ferb, Buford, and Baljeet)
 * "Come Home, Perry" (with the Fireside Girls)
 * "Spa Day" (with the Fireside Girls [Except Adyson Sweetwater])
 * "Fireside Girls" (with the Fireside Girls)
 * "Atlantis" (With Phineas, Ferb, Buford, and Baljeet)
 * "Where Did We Go Wrong?" (With Phineas and Baljeet)
 * "Danville for Niceness" (With Phineas, Baljeet, Buford, and Danville)
 * "The Yellow Sidewalk" (with the Fireside Girls)
 * "The Dad-inator" (own song)
 * "City of Love" (2nd own song in the album version, with Ferb in the broadcast version)
 * "Summer Belongs to You!" (with Phineas, Ferb, Candace, and the Fireside Girls)
 * "The Twelve Days of Christmas" (with the Phineas and Ferb cast on the Phineas and Ferb Holiday Favorites album)
 * "We Wish You A Merry Christmas" (with the Phineas and Ferb cast on the Phineas and Ferb Holiday Favorites album)
 * "Let it Snow, Let it Snow, Let it Snow" (3rd own song on the Phineas and Ferb Holiday Favorites album)
 * "Whatcha Doin'?" (with Katie, Milly, Gretchen, and Holly )
 * "Rollercoaster" [Heard Screaming] (with the Fireside Girls, Phineas, Ferb, and Buford)
 * "Carpe Diem" (with the Phineas and Ferb cast)
 * "Pinhead Pierre Theme" (sung briefly with Lawrence Fletcher and Phineas Flynn)
 * "With These Prints" (With Candace, Baljeet, Buford, and Heinz Doofenshmirtz)