9MUSES A (short for 9MUSES AMUSE) was a four-member subunit of the girl group 9MUSES, formed by Star Empire Entertainment in 2016. They debuted on August 4, 2016 with the single "Muses Diary".
- Gyeongree (경리) - Lead Vocalist, Lead Dancer, Center, Visual, Face of the Group
- Hyemi (혜미) - Leader, Main Vocalist
- Sojin (소진) - Main Rapper, Main Dancer, Vocalist
- Keumjo (금조) - Main Vocalist, Maknae