Psylocke

Elizabeth "Betsy" Braddock, alias Psylocke, is a telepathic mutant. She is also the twin sister of Captain Britain. She was originally a British woman, until her mind was swapped with that of a Japanese assassin. She became stuck in the Japanese body after the assassin died in her original body. However this was not a total loss, as she retained her telepathy and gained the assassin's martial arts skills. She can create a psychic katana, which can cause foes to feel pain as she slices them with it, without causing any actual physical damage to them. She is a member of the X-Men.