Riki Matsui

He was selected to join the group after being one of the finalists from the 2017 Vocal Battle Audition 5 (Rap category). The group made their official debut on May 22, 2019.

He started dancing as a child at his parent's studio called Beat Claps Dance Studio.. Later he joined LDH's dance school EXPG in Fukuoka. For a period of time he studied abroad in NYC to improve his dancing skills and learn English.

His dancing talent led him to join the EXPG special dance project Crasher Kidz where they used to perform in the streets. (fellow BBZ bandmates Ryusei and Ryuta were also part of this project).

He's skilled in dancing and rapping, has won many dance competitions and can also speak Chinese Mandarin.