koko debuted on 25/10/2020, and her character designer is SWAV. koko's first cover was released on the same day. Her first original song was released one month later on 25/11/2020.

koko's first one man live "Player" was hosted on 30/12/2021 in Hulic Hall, Tokyo.

First album "prayer" was released on 23/03/2022.