|Body||, Furry, Kemonomimi, Non-human, Tail, Tiny|
|Personality||, Blunt, Loyal, Mysterious, Pretending, Protective, Reserved, Strange, Watakushi|
|Visual novels||Side character - Koi ga Saku Koro Sakura Doki|
Kotarou is Tina's familiar. He looks just like a stuffed animal, and he talks in a rather formal and spiritless way. According to Tina, he's supposed to promote Yuma's love, but he seems to care little for the troubles of humans. Tina would often treat him rather poorly when she's in a foul mood or when Kotarou incites her anger, though half the time it was because Kotarou's blunt comments would irritate her. But even though he gives off a blunt personality, he seems to care deeply for Tina's well being and would often give her advice or lecture her when she does something unreasonable.