Takatsukasa Kaoruko

Second year student and the protagonist's classmate. She doesn't live in the apartment because she is an ojou-sama living in a high grade place. No one knows why but she is always concerned about the protagonist, but does not display the slightest bit of gentleness, but rather sarcastic, and once she begins the shout there will be no end, she is constantly in disagreements with him. She considers herself Natsuki's rival. However, the related person does not take the rivalry seriously.