Kaho Koyanagi

As the group's mascot, Kaho has a playful and fun personality. She enjoys making jokes and has the ability to control the mood of the group. She is referred to as "everyone's little sister" because of her childish personality.

Renako is later revealed to be Kaho's childhood friend. Renako was unable to remember who she was because her surname had been changed from Minaguchi to Koyanagi.