Mozuya Koto is afflicted with a medical condition known as "tsundere," or Dr. Josef Tsundere's Bipolar Personality Disorder. Her appearance matches the classic tsundere archetype, boasting luxurious golden locks, stunning sapphire eyes, and twin tails. However, her behavior is out of her control, causing her to act aggressively when trying to make friends or show affection. This behavior goes against social norms, leading to Mozuya's struggles with interpersonal relationships. The manga explores her journey as she grapples with her tsundere disorder and the violent outbursts it often causes.