- 1 OCTOBER
- 2 ONSEEON
- 3 Outsider
- 4 Orangestar
- 5 OTHANKQ
- 6 Otokaze
- 7 OVAN
- 8 OSUN
- 9 Onoken
- 10 OdAkEi
- 11 Ourealgoat
- 12 otetsu
- 13 oygli
- 14 Olltii
- 15 OFA
- 16 Okasian
- 17 oceanfromtheblue(오션)
- 18 O3ohn
- 19 Omoi
- 20 OXYNOVA
- 21 On.U
- 22 OLDE WORLDE
- 23 OneSun
- 24 Optical Eyez XL
- 25 Oki
- 26 Odee
- 27 OJ
- 28 osterreich
- 29 O!Gon
- 30 ONE