Yui Kanakura

As Raku’s childhood friend and current homeroom teacher, this influential figure balances a dual life as the powerful leader of the Char Siu Chinese mafia. Although she holds one of the mysterious four keys, she has explicitly clarified to Raku that she is not the girl from his childhood promise. This complex connection to his past makes her a pivotal, yet complicated, presence in his ongoing search for his long-lost destiny.