Yui Kanakura

Yui Kanakura is a childhood friend of Raku Ichijō as well as his homeroom teacher for at least two trimesters starting from the second year. Yui is also the head of the Chinese mafia group, Char Siu. Yui is also in possession of a fourth key but has confirmed to Raku that she is not the girl he had made a promise with ten years prior. Yui has long, silky dark hair with a pinkish-violet tinge (similar to her eye colour in some occasions) and is personalised by several braids while wearing a flowered crown, earrings and a key necklace. In her teacher attire, Yui wears a proper teacher's uniform...