Koji Aono

As the husband of Kasumi Aono and the uncle of Kyouko Aono, this character plays a pivotal role in Tsukune Aono’s backstory. Though his presence in the manga is quite brief, his fleeting appearance during the final chapters of the first year is essential for context. He serves as the key figure who explains the mysterious circumstances surrounding how Tsukune originally obtained his entrance application for the supernatural Yokai Academy.