Luna is a classmate of both Konosuke and Sotoo. She is a very sheltered character who endures a lot of misfortune.
In the first volume: she joins her friend, who is involved in sexual acts with older men while covering it as a "volunteer job," but Luna then flees from the idea of any sexual experience. Sometime later on, she is raped by Kan (a John Wayne Gacy Jr. look-alike), gets made fun of by her classmates, and then lashes out in a fight. After noticing Sotoo, she is invited to an abandoned hotel. When they discover a room with blood puddles, she is strangled and tossed out of the vacant hotel by Sotoo. Shortly afterwards, she is revived by Konosuke as a vampire.
During the second volume: she is alongside Konosuke and becomes a servant to Onna. She wanders off and gets captured and drugged by Bayacan.
