Power was Denji's Demon Hunter teammate (Power herself is possessed by a blood demon, but she is pro-human) and with her, Denji coveted Makima, a control demon. Satan, the lord of hell, was killed by Denji when Makima sent Power to hell. Denji went to hell and cut out dozens of demons and killed the devil himself to save his friend girl. Power is cocky, impudent, quick-tempered, rude, scattered but very attached to Denji. Her nickname is "Powie". She only allowed Denji to call herself that. 