Taru is a student from Class-C, he was formerly living in the oni realm as a "spoiled kid", until Oni-Yama (his aunt), sent him to the human realm to "learn some manners", where now, he attends the Association's school, with his cousin, Ais.

Taru is very cocky/confident in himself, and everyone who doubts him is his enemy. He has a personal vendetta against his cousin, Shu, for always mocking him, and he hopes to put him in his place, one day.