|First Appearance||"Mystery Meat" April 3, 2004|
|Relatives||Danny (brother), Jack (father), Maddie (mother)|
|Friends||Sam, Tucker, Dash|
|Enemies||Vlad, Skulker, Ember, Technus|
Jasmine "Jazz" Fenton is Danny's older sister. Viewing herself as the most rational and normal member of the family, Jazz often plays a surrogate parental role to Danny, thinking he is a naive child in need of guidance, unaware that she is often smothering him. Due to her cherished goal of being a psychologist, Jazz has a bad habit of getting into people's personal space.
When she secretly discovers her brother's secret identity, Jazz has quietly made excuses for him while he went out to fight ghosts, and slowly starts to realize that her brother is growing up fine on his own. Along the way, she learns to appreciate her family's ghost hunting and actively takes part at times. She has also learned to embrace her sixteen-year-old self instead of acting like an "adult in a teen body".
Nicktoons: Globs of DoomEdit
Jazz appears as a non-playable character in Nicktoons: Globs of Doom. She is one of the people who must be saved from the goo. She is found at the end of the second arena of Amity Park inside the Axion Labs. She thanks you happily when you saved her, as she was a bit worried. She goes to Volcano Island afterwards.