A younger female clone version of Danny Phantom, she was created by his arch enemy Vlad Plasmius accidentally while he was trying to clone Danny Phantom.
As Danny's clone, Danielle shares some similarities with Danny, notably her in human form. She has the same skin, eyes and hair as Danny, the only exception being the ponytail in her hair. She wears a red beanie and shorts, a blue sweater/hoodie, and has the same shoes as Danny, only blue with white dots on the side.
In ghost form, her skin, eyes and hair and a ponytail are the same colors as Danny Phantom. Her collar is sometimes gone and smaller than Danny's. The right of her side of her shirt is inverted, her right arm is white and her glove is black and her left arm is black and her glove is white. She has no belt, instead her waist, as well as her belly button, are shown. GAY She has streaks of white on the sides of her pants, and wears white shoes. She has the same emblem as Danny, only it is sometimes darker and blacker.
Danielle also shares many of Danny's likes and personality traits. Unlike the other failed experiments, 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 naïve, which is, in part, due to her limited existence so far.
Potentially stated to be at least twelve years of age physically, in reality, her actual age is at possibly a few months at most. Because of her limited knowledge, Danielle was easily talked into obeying Vlad's every command, and it wasn't until she met Danny that she realized that she was just "a mess that Vlad's not going to clean up".
Danielle's greatest weakness is that she can't go all-out with her powers like Danny can. Her unstable clone DNA is unable to handle such a power strain, and she'll start to destabilize into a puddle of ectoplasm when she begins to wear herself out. Although her body can reform when she's not actively using her powers, this handicap is enough to prevent her from fighting to her fullest extent. With Danny's help, she eventually gains stability to maintain a solid form and ultimately sustain her powers.Also,the power of Danny's Ghostly Wail can cause to revert to ectoplasm.