Ginger is a light brown-skinned girl with straight jet-black hair and brown almond-shaped eyes. Her uniform has a red turtleneck collar and cuffs, and canvas shoes with a dark red line pattern. In winter, she switches to a light yellow sweater with a Christmas tree on it, has leggings with her skirt, long red boots with white laces, and has a brown hairband with a red bow on her head.
Ginger has a crush on Baljeet, similar to Isabella having a crush on Phineas. She expressed this interest many times when the Fireside Girls looked for the maracanut tree; however, no one else seems to understand her crush, unlike Isabella's. In fact, the other girls have revoked her "I Just Saw a Cute Boy" patch twice merely for claiming Baljeet was cute.
In the show's last season, it was often implied that Baljeet reciprocates Ginger's feelings for him. They are shown dancing together in "Happy New Year" and "Druselsteinoween". And in "Bee Day", when Baljeet is talking to Ginger about the bees' "waggle dance", but is interrupted when Phineas asks him for help and Ginger is turned into a bee while his back is turned. Ginger later uses the information Baljeet gave her and helps the other girls get their Beekeeping Patch by explaining how to communicate with bees via the song Waggle Dance. And in the future shown in "Act Your Age", the two have become a couple.
It is unclear what Ginger and her older sister Stacy think of each other as most of their interaction is when Phineas and Ferb are doing one of their Big Ideas. In "For Your Ice Only", she wanted to go on the computer with permission from their mother, saying it was her turn to go onto the computer, but was unlikely able to, as Stacy was trying to help Candace learn hockey terms while trying to bust Phineas and the others at the hockey rink. However in "One Good Turn", it is revealed Ginger got all those trophies because she looks up to Stacy and wanted to impress her.
She bears a striking resemblance to Candace's best friend, Stacy Hirano, which had led to some speculation that she is Stacy's little sister, though this could have been a simple coincidence. On May 31, 2012, Swampy confirmed that Stacy is her older sister. And in the episode "For Your Ice Only", it is shown they are sisters. 
She and Katie appeared in "Rollercoaster" during the grand opening of Phineas and Ferb's rollercoaster, though they weren't wearing their berets or sashes.