Kotone is a bubbly girl who attends to Gekkoukan High. She's 16 years old, she has red hair. When not wearing the uniform, she wears a white blouse with red stripes. She always wears headphones. Even though her bubbly and cheerful attitude, deep inside she's deppressed for losing her parents in an accident. She's sometimes labeled as a tomboy, though she doesn't seem bothered by the nickname, she doesn't like people thinking she isn't feminine.