- 1 OoOo
- 2 OLIVIA
- 3 OOHYO
- 4 Otomania
- 5 onthedal
- 6 OH!nle
- 7 Oranje.
- 8 Oran-G
- 9 Ora
- 10 ONE
- 11 OSTER project
- 12 OKI
- 13 Only You
- 14 OVCOCO (오브코코)
- 15 Odd Time
- 16 okogeeechann
- 17 OHNEW
- 18 Osanzi
- 19 oiko
- 20 onsu
- 21 Obze (오브제)
- 22 OA
- 23 OPENN (오픈)
- 24 欧若拉
- 25 On1ynn_
- 26 Oo
- 27 OUL (오울)
- 28 ODD-CAT (오드캣)
- 29 Okayuka
- 30 Offing (오핑)