From the beginning, the filmmakers wanted Kida to stand out from other Disney Princesses both in appearance and in personality. So as not to appear as another damsel in distress, they created her to be a warrior woman with the strength to overcome hostility.
The supervising animator of Kida was Randy Haycock. Randy further wanted to develop a unique appearance for Kida that made her different from the other Disney Princess. Going through various magazines and looking at models, he drew her with a slightly wider nose and full lips. He also wanted to play the characters personality of being stoic and firm while also having a soft, playful side that is left out when she meets Milo.
Cree Summer provides the voice of Kida. Cree was excited to finally get to voice a character in a Disney animated feature after having been in the business for over fifteen years by that point. Haycock noted how he felt intimidated by Cree's wild and unique personality the first time he met her and drew inspiration from that into developing scenes where Kida and Milo first meet. Natalie Strom voiced Kida as a child in the film's prologue, which was added in late in production, while Cree would reprise the character in the sequel.
Kida is a warrior princess, making her strong and very skilled at combat. It is mentioned that several thousand years ago, Kida would have killed outsiders on sight. By the present time, however, Kida has become so curious about Atlantis's past that she is willing to let in outsiders with the hope that they could help her rediscover Atlantis's history, even as far as taking a liking to Milo. She is shown to love her father and husband very much. Although she can seem quite forceful, violent, and aggressive at times, she has a kind heart and a general respect for all creatures.
Like all Atlanteans, Kida has white long hair and brown skin. She has blue-colored tattoos (which represent teardrops), which appear to change slightly after she becomes Queen and large blue eyes. She also wears a shard of the crystal around her neck. With the power of the Atlantean crystal, Kida and the other Atlanteans are given abnormally long lives. Though Kida is roughly 8,500 - 8,800 years old (according to Milo), she physically resembles someone in their mid-late 20's.
Her attire changes when she makes the transition from princess to a queen, with her clothes going from being very revealing to being elaborate. As a princess, she wears only a simple blue bikini, the top being a strapless bandeau and the bottoms are covered with sarong type skirt and she goes around barefoot, but changes into more elaborate clothing and obtains sandals after becoming Queen. In the sequel, her dress is a strapless dark turquoise dress with two slits on either side and a gold chevron pattern on the hem, with a red sash at the waist and a dark blue cape with a gold underside attached to the rear. In the short story "Milo's Rescue Mission", Kida can actually revert to her princess outfit even as a queen.
- “Cookies are sweet, but yours is not. Sweet is kindly, but that is not his name. Audrey is sweet, but she is not your doctor. And the little digging animal called Mole.... he is your pet?”
- ―Kida Nedakh
At a very young age, Kida is present when a gigantic tsunami threatens the central city of Atlantis. She watches in tears as her mother is suddenly chosen by the Heart of Atlantis to save the city, leaving the young child behind. Her father quickly covers her eyes so as not to look.
Centuries later, Kida leads a small group of hunters and gathers through the earth's many caverns and catacombs when they notice a large group of outsiders approaching their city. They keep watch on them with her believing that their being able to find Atlantis could mean that they could be of help. When the expedition desperately escapes an attack from fireflies, they come upon a lone member who is injured. Kida decides to help heal the outsider before taking off.
When the expedition eventually finds Atlantis, Kida and her group confront the expedition. When the man she had just healed reveals that he can speak Atlantean, she opens up to them and immediately takes them to her father. However, her father demands that they leave without explaining why. When left alone, she gets into an argument with her father regarding how their way of life is dying while he believes it is being preserved.
Unconvinced, Kida singles out the man who is named Milo Thatch. Realizing that she does not even know how to read the Atlantean written language, he agrees to help her as they explore the city. They come to a pond where underneath are numerous writings she has him translate. He is able to figure out information regarding the Heart of Atlantis, which is the power source keeping the city alive and was what took her mother away.
Upon surfacing, they find that the rest of the expedition plan to steal the Heart of Atlantis and sell it on the black market. Their leader Lyle Rourke forces Milo to cooperate by having a gun pointed at Kida. Kida watches in horror as they ransack her father's chamber, which is followed by the leader striking her father down before he figures out where the Heart of Atlantis is hidden. Inside the Crystal Chamber, she is called upon by the crystal and she bonds with it before being encased within a container.
Kida remains inactive as a battle ensues for her, of which Milo is successful in bringing her back to the city in time for her and the Heart of Atlantis to raise the giant stone guardians from their slumber and create a force field to protect the city from an awakened volcano. With the city saved, Kida is released from the crystal and leaves her with a bracelet of hers that her mother held onto when called upon previously by the crystal.
Because of her father's death, Kida becomes the Queen of Atlantis. Milo stays behind, having fallen in love with her and to help the civilians rediscover their lost culture. Among her first acts is for a stone effigy of her father be constructed to join the other stone effigies of the past kings orbiting the Heart of Atlantis that now hovers over the city.
Kida, as Queen of Atlantis, is working with Milo, who is now her husband, to use the Heart of Atlantis to rebuild the civilization. They are unexpectedly visited by their comrades from the first film. They learn that a creature called the Kraken, which is presumed to be an Atlantean defense mechanism, is attacking a town. Kida and the others travel and are able to stop the creature.
While Kida adjusts well to the outside world, she feels guilty because there could be more Atlantean machines wreaking havoc. Kida and the others travel to Arizona, where they find a town with a statue that appears to be of Atlantean origin. They are also forced to confront the coyote spirits who oppose them. A Native-American man is able to serve as a median, and Kida learns that she has the power to choose Atlantis's destiny.
Later, Kida and friends travel on a search for the Gungnir, a mythical spear of Atlantean origin. They track the thief, a man named Erik Hellstrom, to the Nordic Mountains. There, he presumes Kida to be his daughter (Erik believes himself to be Odin) and kidnaps her. Hellstrom intends to end the world by bringing about Ragnarok and creates various beasts. Kida is able to retrieve the spear after Vinnie provides a distraction.
As a result of the adventures, Kida learns about the power of the Atlantean crystal and comes to believe that her father was wrong for hiding it. She combines the Heart Crystal with the spear and uses its power to raise Atlantis to the surface. It should also be noted that unlike in the first film, Kida for some reason does not have the extra tattoos obtained on her face from her wedding to Milo/coronation as Queen.
Kida appears briefly in the episode "Donald Wants to Fly". She is flying on a Ketak, an Atlantean vehicle carved in the shape of a fish.
Kida appeared in Disneyland and Walt Disney World when the film was first released, dressed in her queen robes from the end of the film (probably because of the fact that her main outfit in her film may spark controversy from parents visiting the parks at the time). Kida and Milo also appeared in the Disney Stars and Motorcars Parade in a car designed after a Ketak for the first year of that parade's run.
After a several-year absence from the parks, Kida and the other Atlantis characters made a reappearance at Disneyland Paris during the Disney Dreamers Everywhere events in 2013.
- Although a definite princess by birth, Kida is not included in the Disney Princess franchise due to the movie's failure performance at the box office.
- Kida's dress at the end was only seen completely in a few concept art such as in some character galleries in Disc 2 of the 2-Disc Collector's Edition, and the books Subterranean Tours: Atlantis: A Traveler's Guide to the Lost City and Milo's Rescue Mission (though without a tiara, see above). All other book illustrations showing her in that dress either show only the top half (Play-a-Sound book, Wonderful World of Reading, Dark Horse comic, Atlantis 2002 calendar, etc.), have the train (back part of the dress) cover the front (Read-Aloud Storybook, various coloring pages), or seen from far away ("The Final Stand", "How to Draw", Ladybird book, Kida: The Heart of Atlantis, etc.). Additionally, her face character incarnation at the theme parks depict her in her queen dress and tattoos, but without a tiara.
- Likewise, her huntress armor when her mask is removed is only seen completely in some promotional artwork.
- The feathers on Kida's tiara at the end (one large pink feather between two smaller blue ones) resemble the ones on José Carioca's tail.
- The pink chevrons on the dark blue-with-gold outlines sash hanging from the front of Kida's otherwise mostly light blue dress in the ending, from the shoulders down, form a "V", an "X", a "^", (the ones we only see in the film) a "][", a semicircle and another "^."(implied, see above books)
- Though she does not appear until halfway through the film, three tie-in storybooks, Kida and the Crystal, The Mark of a Princess and My Princess Collection: Kida: The Heart of Atlantis, are basically retellings of the film's plot but from Kida's point of view. What's different between those three books is that the first ends during the scene where Milo and Kida are shown exploring the underwater mural, while the last two continues from that point, including her kidnapping and subsequent crystallization by Rourke, her being rescued by Milo and his teammates from Rourke and protecting Atlantis from an erupting volcano, and finally her marrying Milo and becoming Queen (the only difference being that The Mark of a Princess is narrated in third-person, while Kida: The Heart of Atlantis is narrated by Kida herself).
- If you listen very closely, then you can easily tell that Kida has an almost British-sounding accent, otherwise known as "Queen's English". However, she reverts to an American accent (typical of characters Cree Summer has voiced) in the sequel.
- Due to modesty reasons, Kida's artwork promoting the Atlantis 2002 home release showed her in her queen dress (though without her tiara and extra tattoos), as her left arm was covered by the dress' sleeve.
- However, the original 2002 one-disc home release of Atlantis was the only release of that film to actually feature Kida on the cover art along with her husband Milo and his teammates (Mole, Vinnie, Audrey, and Sweet, Cookie and Mrs. Packard for some reason are both absent). The two-disc collector's edition of the film featured only the Ulysses submarine and its escape pods but no characters, and the Blu-Ray art for some reason although still has the same main protagonist explorers as the original (Cookie and Mrs. Packard are still absent), Kida is nowhere to be seen except as a silhouette at the very top, but is obscured by the crystal and the film's title (the second "A" is positioned so that it and the Crystal overlap each other) and the two antagonists, Rourke and Helga are added instead.
- Kida's skin color appears to be very inconsistent depending on the lighting, she is supposed to have lighter skin than the other Atlanteans, but darker skin than Milo's. However, in Milo's Return, Kida for some reason is drawn with much darker skin.
- Kida's title as "princess" was only mentioned near the end of the film when Milo is gathering the other explorers and Atlanteans to save her from Rourke and his minions. In Milo's Return, she is occasionally referred to as a "queen".
- In the various promotions for the film, Kida is the only character that isn't shown, nor does she ever have a biography.
- Kida was originally going to have pale skin and reddish-brown hair. Her final design appears to be an amalgamation of different races, particularly African (brown skin and half-black voice actress) and Polynesian (there are Polynesians with dark skin and fair hair), with some East Asian (shape of her eyes), Native American (shape of her nose), Scandinavian (white hair is a common trait in Scandinavian people), and Caucasian as a whole (white/blonde hair+blue eyes) elements as well.
- Strangely enough, one of Kida's early concept art didn't even look human.
- Despite not being an official Disney Princess, Kida made a brief cameo in the book The Art of the Disney Princess.
- Kida also made an appearance in the My Princess Collection book series along with the first eight official Princesses as with Alice, Princess Dot, and Jessie the Cowgirl.
- When Kida takes off her sarong, her anklets mysteriously vanish. They eventually reappear when she puts her sarong back on.
- Kida is represented by the colors blue (clothing and eyes), white (hair), and gold (jewelry).
- She is also represented by either her crystal necklace, her tattoos, the Atlantean "A" (a triangular spiral with a dot in the middle), and/or the Shepherd's Journal (her husband's book).
- Kida's name originates from a Kiowa girl's name meaning "raising away the darkness." Coincidentally her voice actress Cree Summer is part Native American, and her first name is also the name of a Native American tribe.
- Kida had actually experienced some magic in her life: a lot of the Atlanteans wear magic crystal shards around their necks, which give them magic powers like immortality and healing abilities, and even merged with the Mother Crystal itself.
- Kida can be seen crying as her mother is "killed" at the start of the film as Atlantis is sunk underwater. Also, according to Randy Haycock, her animator, Kida's tattoos represent her tears.
- Kida briefly twirled as she is drawn upward into the Crystal during her transformation into it. However, since a princess twirl usually ends with something bad happening to them, after her transformation she is locked in a crate by Rourke and Helga.
- Kida's facial structure was inherited from her mother's, although her skin is lighter. She also resembles her voice actress Cree Summer.
- Kida actually fled Milo after healing his wounds during their first encounter, although they really fled from Mole's digger as they heard it and the other explorers approaching.
- The coronation of Kida as Queen of Atlantis at the end of the film serves as a bookend to her film, since Atlantis began with her mother's death during the Great Flood that sank Atlantis, and therefore ending that queen's reign, and ends with her coronation, and therefore beginning her reign as queen.
- Although many Atlanteans treat the Mother Crystal as a deity, it's possible that Kida may have learned about Christianity and to a much lesser extent, Christmas from Milo.
- Kida loses her tattoos in Milo's Return due to budget and how difficult they were to animate.