Ryuuhei

A classmate and childhood friend of Mami and Junko that has always been popular with girls. After his hair suddenly turned white in class, he became shunned as a "child of calamity" by the island's superstitious inhabitants. Around a week later, he showed up on Mami's doorstep, asking to stay at her house after being kicked out by his family. Voiced by [Nojima Hirofumi](https://anilist.co/staff/95341/) in the radio drama adaptation of BLUE DROP.