Dani is a clone of Danny created by Vlad. Her abilities and interests are nearly identical with that of Danny, but she is by no means the same person. For one thing she's female and for another she looks two years younger then him. Unlike the other clones created by Vlad she has her own personality and can think for herself, which is why she was able to turn against her "father" in the end. But she is still an imperfect clone so ever time she uses her powers she's in danger of melting. She has been stabilized as of D-Stabilized.
A female version of Danny Phantom. Danielle is a twelve-year old clone created by Vlad as one of many creations for a clone of Danny. She claims to be his third cousin once removed. She was first obedient to Vlad, her "father", but after seeing he lied about saving her and is only interested in the primary clone, she sides with Danny. She has all of Danny's powers and Danny's interests.