BLACK DIAMOND is a dance and vocal group formed in March of 2023. With SiX Members: Birth Name: Okita Anri Stage Name:Anri Birthday: October 28, 1986. Stage Name: L.V Birth Name: Sayama Ai (佐山愛) Birthday: January 8, 1989. Stage Name: MARY Birth Name: Tachibana Mary Birthday: July 7, 1993. Birth Name: Otani Mama Stage Name: ARIS Birthday: December 19, 1993. Birth Name: Nanasaki Miiro Stage Name: MIIRO Birthday: June 8, 2002 And You