Kamisato Kyoko, she is a member of the Kamisato family, hiding her name from the rest of the world disguised by the name Erika, she can maintain a life outside the property of the kamisato, however, her escapades using that name were discovered by a group of assassins, it was at that moment that Taisei found her and rescued her. Kyoko, despite being from a noble family and having received the best education, can be the same as any other girl when she is with Taisei, although she is able to bring out all her refined lady behavior when required.