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|Relatives||Taito Kurogane (Brother)|
|Anime Debut||Episode 6|
Yuika Kurogane (鉄 ユイカ Kurogane Yuika) is the sister of Taito Kurogane who talks to him after finishing her bath in the start of Episode 6.
Yuika has brown hair that is tied in a high ponytail and brown eyes.
Yuika probably shares a parent or two with Taito Kurogane.