Valkyrie is a former member of Chronos and host to a Guyver unit, Valkyria is the manga counterpart of Valcuria from the animated Guyver movie, Guyver: Out of Control in which she replaces the role of Oswald A. Lisker as Guyver II. She is incorporated into the manga storyline as Guyver II Female. She activated the Unit in an unknown location, and for unknown reasons. She is plagued by bouts of fatigue and dizziness even in human form as a result of becoming a Guyver; her powers may come with a fatal expiration date.