Emma Frost is the former White Queen of the villainous Hellfire Club, but now a member of the X-Men with her lover Scott Summers. She's a mutant with telepathic powers and the ability to change her entire body into diamond.
Emma is a mutant and has the power of Telepathy. She can read people's minds, shield her thoughts from other telepaths, control other people, and fire bolts of psionic energy that can either incapacitate and individual or kill them.
Emma acquired a secondary mutation that allows her to turn her body into organic diamonds. She is virtually invulnerable in this form but can no use her telepathy while she is in this second form.
Pryde of the X-Men
Originally a pilot episode animated by Toei Animation for an X-Men Animated series but never made it as a full series.