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