Mizuiro Kojima (小島 水色, Kojima Mizuiro) is a student in Karakura High School and is in the same class as Ichigo Kurosaki.
When Mizuiro first met Rukia Kuchiki, Ichigo warned her that he was sly with the ladies. Mizuiro countered by saying he prefers older women, Ichigo comments that Rukia should be careful, which leaves Mizuiro confused. Mizuiro is resourceful, level-headed and calm even in detrimental circumstances and can maintain his cool even in the presence of Aizen. These traits allow him to think straight and plan contingencies ahead of time. He also likes to tease his classmate and friend Keigo by calling him "Asano-san" (Mr. Asano in the English dub), when he is overreacting, which makes him even more agitated. Despite his cheerful appearance he can be quite cruel, shown by not accepting his own mother. Keigo mentions that Mizuiro is good at "putting up walls" and the only person he ever really opened up to is Ichigo.
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