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