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Hisui (翡翠, lit. jade) is a character from Tsukihime. She also appears in Kagetsu Tooya and Melty Blood.
She has blue eyes.
Her twin sister is Kohaku.
She is voiced by Kakazu Yumi in the anime series and by Ichinose Kana in Melty Blood and Tsukihime replacing Matsuki Miyu.