Hisui Hatsushiba (初柴ヒスイ,Hatsushiba Hisui?) is a girl who is the one of candidates of inheriting the Sanzenin fortune.
Appearance
She is seen to have dark hair, which she ties into a ponytail.
Story
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She is the neice of Mikado Sanzenin and also Nagi's childhood friend. Although she is the one of candidates, Mikado himself doesn't want her to inherit the Sanzenin fortune. That's why she sent her maid, Yozora Housen to spy on Hayate, Nagi and Ruka and decide to use Ruka as the new candidate for opening Royal Garden.