Yoon Sang Ah, known simply as Sangah, is a South Korean singer, dancer and member of LIGHTSUM. She graduated from Inseong Girls’ High School, and before debuting, she took classes at PinkM Dance Academy and A-Root Dance Academy.
She officially debuted in 2021 as the group's lead dancer and rapper with their 1st single "Vanilla". In 2023, she entered the girl group survival show "Queendom Puzzle" but was eliminated in episode 7.
(Source: Korean = NamuWiki)