Mikoto Kobayashi

Sayuri's little sister. They were separated thirteen years prior to the beginning of the story when their parents divorced and Makoto went with their father while Sayuri stayed behind with their mother. One day she suddenly appears near Sayuri's workplace with angel wings on her back and a halo over her head and moves in with her. It is later explained that she ran away from home when she was granted with these angelic features by an entity she refers to as god because she wished to meet Sayuri again. Her angelic features can only be seen by herself, Sayuri and Oga.