Kwannon

The woman the Hand named Kwannon is a ninja assassin raised from a young age to be a killer. A mutant psychic and one of Japan's top enforcers, she ultimately abandoned the Hand and became the personal operative of the crime boss Lord Nyoirin. This brought her into conflict with her lover and rival, Hand assassin Matsu'o Tsurayaba. After she nearly died in battle against Tsurayaba, the Hand, having assistance from the witch Spiral, had Kwannon's comatose body mind-swapped with Betsy Braddock, the X-Men member Psylocke.

Believing herself to be Braddock, Kwannon took the name Revanche and joined the X-Men, uneasily having Braddock as a teammate. After contracting the lethal Legacy Virus, Kwannon remembered her true identity and was mercy-killed by Tsurayaba at her request. Braddock continued to live in Kwannon's body for many years. When Braddock was killed by Sapphire Styx, she telekinetically rebuilt her original body, while Kwannon was revived and finally restored to her own body.