Riina (리이나) is a South Korean singer under Grandline Group. She is a member of the girl group H1-KEY and a former member of the pre-debut trainee team WM Ggumnamu. In 2018, she appeared as a contestant on the survival show Produce 48 where she represented WM Entertainment. She was eliminated in episode 5 after ranking 73rd place.
She debuted as a member of H1-KEY on January 5, 2022 with their first single "Athletic Girl".