Kim Su A, known professionally as Baek Ah, is a South Korean singer, dancer, and former member of NEONPUNCH (네온펀치) and XUM (썸). She graduated from Korea Entertainment Arts School and later obtained an associate's degree in Practical Music from KAC Korea Arts Academy.

She first appeared on TV as a contestant in the singing survival show "MIXNINE" but ended up in the Top 25. She returned to her agency and made her debut in July 2018 as NEONPUNCH's lead vocalist, lead dancer and center with their first single, "Moonlight". However, after releasing a mini-album in early 2019, the group did not have any scheduled activities.

I-Star Entertainment (아이스타엔터테인먼트; formerly known as A100 Entertainment) opted to disband the group in August 2020 as 2 members were already on hiatus. The three remaining members (including her) remained in the company and were set to re-debut as a new group.

She re-debuted in September 2020 as XUM's vocalist with their first single album, "Ddalala". Unfortunately, the group was not successful, and the COVID-19 pandemic forced it to go on an indefinite hiatus. They officially disbanded in June 2021.

Since then, she has remained out of the entertainment industry.

(Source: MyDramaList) Edit Biography