- 1 欧阳菲菲
- 2 OLIVIA
- 3 OSTER project
- 4 OoOo
- 5 OH!nle
- 6 欧若拉
- 7 OOHYO
- 8 OYEON (오연)
- 9 Osanzi
- 10 Only You
- 11 OVCOCO (오브코코)
- 12 Odd Time
- 13 OPENN (오픈)
- 14 ocsoosu
- 15 OmyuO
- 16 Oneknob
- 17 ochobee
- 18 OKI
- 19 OHNEW
- 20 Obze (오브제)
- 21 Offing (오핑)
- 22 OKEY W
- 23 OnD
- 24 Odett
- 25 ONII
- 26 Ondé
- 27 oi
- 28 olive
- 29 Oo
- 30 OUL (오울)