Uyu Ritsuki

 (兎遊 りつき), formerly known as Hiiragi Ayumu (柊木あゆむ) and Uyu (うゅ), is a member of 13-Gatsu no Asterisk and former member of BLACK SNOW, OXYGENLOVER and mush uuuuup!!!.

He joined BLACK SNOW on April 15, 2021.