Rapi was once a Mass-produced Nikke with the serial number RR-15436. At some point in time, Rapi met Red Hood, a former member of the legendary Goddess squad. When Red Hood died, Rapi somehow assimilated her entire body, becoming Rapi (Red Hood). This has gave her the ability to release immense heat from her body and intensified her strength.
Later she was upgraded and became a member of Absolute, Elysion's most powerful squad consisting (currently) of Emma, Eunhwa, and Vesti. However during a mission, one of Rapi's explosives killed a human, causing her to have an identity crisis. This led to Rapi leaving Absolute, much to her teammates dismay, and eventually joining the Counters.
