Jazz Fenton

Jasmine "Jazz" Fenton is a crossover character in the series, Danny Phantom.

Character Info
Jazz Fenton is a cyan squrriel who, being the older sister and feeling the most rational of her crazy family, takes it upon herself to be the "mature" figure, often criticizing her parents' obsession with ghosts and protecting her younger brother. While she may not know it, she often uses her intelligence as a means of superiority over others, going completely bonkers if she's shown to be wrong and often using her older sister status to "boss" Danny around, acting more like a mother than a sister. Simply put, she's more of an adult stuck in a teen's body. Ultimately, she means well, using her knowledge to point her parents in a more "normal" direction and keeping an overprotective eye on Danny, even if it sometimes is quite an annoyance to others.

Jazz eventually develops as the show progresses, starting off as a rather snobbish genius who refuses to be associated with her parents while maintaining a serious attitude, only for her to later discover how much fun ghost hunting is and embracing it, as well as toning down her serious nature and discovering her inner child while still being her supportive self. Her sudden increased interest in ghosts causes Jazz to imply or hint she is suffering from "ghost envy" when she states she desires to be a ghost to get her parents' attention. In addition, she develops a deep respect for her brother's selflessly heroic nature and attempts to support him.

She helps Danny by continuously covering his identity from suspecting eyes--particularly their parents. She is also terrible at giving ghosts names, (Crate Creep: Box Ghost, Lunch-A-Belle: Lunch Lady, Ghost X: Skulker, Creep Walkers: Sleep Walkers, etc.) and making puns.

Trivia

 * Jazz is downright one of the smartest characters in the series, a real genius of her own, getting the highest score in the C.A.T.