- 1 欧阳菲菲
- 2 OoOo
- 3 OLIVIA
- 4 Osanzi
- 5 OSTER project
- 6 OOHYO
- 7 OH!nle
- 8 Oran-G
- 9 OUL (오울)
- 10 Okayuka
- 11 OMOIDE LABEL
- 12 OmyuO
- 13 oshii
- 14 OYU
- 15 OnD
- 16 ONE
- 17 Only You
- 18 OYEON (오연)
- 19 Obze (오브제)
- 20 OA
- 21 Offing (오핑)
- 22 OKEY W
- 23 ocsoosu
- 24 OHDH (오드)
- 25 OWA
- 26 Oen
- 27 olive
- 28 OKI
- 29 OVCOCO (오브코코)
- 30 onsu