Ren Koseki was born on May 10, 1995 in Tokyo. The talent has over 150,000 followers on social media. 

After working as a reader model for fashion magazines like CUTiE and CHOKiCHOKi girls, she began appearing on variety shows and has become a controversial figure in the modeling world for her strong opinions. A hard worker, Koseki is currently a regular on ABEMA’s Saturday TheNIGHT (airing Saturdays at 24:00) and interfm’s Koseki Ren no Kojirase Radio (Saturdays at 27:00).