Heesu (희수) is a singer under Moai Entertainment. She is a member of HeyGirls and a former member of Black Queen.
She attended Paekche Institute of the Arts, Seoul, South Korea, where she majored in dance.
In 2016, Heesu joined Black Queen and later officially debuted in the group with the digital single “Nolja”, after the group’s re-branding she was announced to still be a part of the group (now named HeyGirls).
Source: kpop wiki