Рэйна

Мотоя's younger sister, a high school student, became a fan of ChamJam after seeing Mayna at the Okayama Girls Festa festival, which she attended with her brother. Reina is preparing to take the college entrance exam, so she cannot attend ChamJam's live performances as often. However, Erikpee is very happy about the expansion of Mayna's fan base. Externally, she resembles Sorane Matsuyama.