Danielle Fenton/Phantom is clone of Danny Phantom. she is a younger, female version of Danny Phantom, created accidentally by his archenemy Vlad Plasmius when trying to clone Danny Phantom, She is also G-merl's girlfriend. (For "Gmerl's Eternal Quest" and "Tino and Sunset Shimmer Chronicles: Legend of the Golden Keyblades" only)
Danielle shares many of Danny's likes and personality traits. She is not mindless and doesn't mind voicing exactly how she feels. A very willful and somewhat tomboyish girl, she's a lot like Danny, only more cheerful and childish. She seems to have no concern with responsibility, and can be quite stubborn at times. She can also be quite naive, which is, in part, due to her limited existence so far. She was once an enemy but after seeing who Vlad really is, she defeated him and turned into the side of good.