Tsubasa Katsuki

Tsubasa is Koyume and Kaos's senpai, as well as Ruki's roommate. Tsubasa is a shonen mangaka, and the author of the Dark Hero's Revenge Story. Tsubasa also has a tendency to act like her characters, and acts like shonen cliches are normal. Tsubasa also ends up sleeping in class due to working so late. Koyume has a crush on Tsubasa.