錐生 零

优姬的青梅竹马，零也是Guardian，同样在风纪委员会任职。自从他被带进他们家（园长的家）后，优姬一直把他当作弟弟照顾。他的家族是吸血鬼猎人世家，在他年幼时被纯血种吸血鬼绯樱闲灭门。他对吸血鬼怀有深深的仇恨，并声称自己担任Guardian是为了更好地学习猎杀他们。

简介来自 VNDB · 由机器翻译生成

Yuuki's childhood friend, Zero is also a Guardian and likewise on the disciplinary committee. Yuuki has been taking care of him as her little brother since he was brought into their home (the Headmaster's). His family, a line of vampire hunters, was murdered by the pure blood vampire Shizuka Hio when he was young. He harbors a deep hatred for vampires and claims to have taken on the role of Guardian to learn to hunt them better.

简介来自 VNDB