After her brother, who had been researching ways to fight against the demon race, was assassinated, Shiranui Miki continued battling the demons using the power of Sailor Phoenix passed down to her. During her fight, she successfully defeated the demon commander Dyvalva. However, the demon king Daekon ignored her achievement and instead dispatched Delalva, Dyvalva's sister and a loyal demon maid devoted to him. Delalva, possessing overwhelming combat strength and a body devoid of pain sensation, tormented Miki while absorbing the power of Sailor Phoenix, transforming herself into the pitch-black sailor warrior, Sailor Meteor. After defeating Miki in battle, Sailor Meteor captured her, gradually draining her energy while stripping away her costume piece by piece, ultimately siphoning all her strength. In the end, Miki was completely defeated and fell entirely under Sailor Meteor's control. [BAD END]