Marvel Universe

The woman named Kwannon by the Hand is a ninja assassin raised from birth to be a killer. As 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 switched with that of Betsy Braddock, the X-Man Psylocke.

Confused and 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, she discovered her true nature and was mercy-killed by Tsurayaba at her request. Braddock continued to live in Kwannon's body. When Braddock was killed by Sapphire Styx, she telekinetically rebuilt her original body, while Kwannon was revived in her own. Kwannon became an ally to the X-Men once more. She has claimed the codename Psylocke.

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