Revanche (Kwannon) was a short-lived Marvel Comics character, associated with the X-Men.
Originally, Kwannon possessed a low-level empathic talent that allowed her to sense the emotional state of others.
Upon inhabiting Psylocke 's former body, Revanche gained telepathic abilities which enabled her to read minds, communicate with others by broadcasting her thoughts, control the minds of others, and create realistic illusions by altering people's perceptions. She could physically manifest her telepathic powers as a blade (like Psylocke's psychic blade), but instead of a small energy dagger she created an ornate psionic katana. The blade could disrupt the autonomic nervous systems of other living beings, incapacitating them instantly. Revanche could also use her psychic katana to force her way into an opponent's mind and reveal any thoughts that were originally shielded from her telepathic powers, including those of other telepaths.
Being relatively untrained in the use of her telepathy, Revanche rarely employed her abilities beyond generating psionic blades and unconsciously clouding the minds of others