| character:old_god_ivern | character:ivern | |
| character:old_god_mordekaiser | character:mordekaiser | |
| character:old_gold_fuse | character:fuse_(apex_legends) | |
| character:old_town_mirage | character:mirage_(apex_legends) | |
| character:olga_marie_animusphere_(8th_anniversary) | character:olga_marie_animusphere | |
| character:olga_marie_animusphere_(afternoon_party) | character:olga_marie_animusphere | |
| character:olimin | character:olimar | |
| character:oliver_evans_(1st_costume) | character:oliver_evans | |
| character:oliver_evans_(2nd_costume) | character:oliver_evans | |
| character:oliver_evans_(3rd_costume) | character:oliver_evans | |
| character:oliver_evans_(4th_costume) | character:oliver_evans | |
| character:oliver_(maghni_ai) | character:oliver_(vocaloid) | |
| character:olivia_(summer)_(granblue_fantasy) | character:dark_angel_olivia | |
| character:olrun_(fate) | character:valkyrie_(fate) | |
| character:omaru_polka_(1st_costume) | character:omaru_polka | |
| character:omaru_polka_(5th_costume) | character:omaru_polka | |
| character:omaru_polka_(6th_costume) | character:omaru_polka | |
| character:omaru_polka_(new_year) | character:omaru_polka | |
| character:omaru_polka_(school_uniform) | character:omaru_polka | |
| character:omaru_polka_(street_casual) | character:omaru_polka | |
| character:omatsuri_fury_valkyrie | character:valkyrie_(apex_legends) | |
| character:omega_auru_(primagista) | character:omega_auru | |
| character:omega-f | character:omega_(final_fantasy) | |
| character:omega-m | character:omega_(final_fantasy) | |
| character:omega_point_pathfinder | character:pathfinder_(apex_legends) | |
| character:omega_rugal | character:rugal_bernstein | |
| character:omega_squad_tristana | character:tristana_(league_of_legends) | |
| character:oni_genji | character:genji_(overwatch) | |
| character:onigiri_(vtuber)_(1st_costume) | character:onigiri_(vtuber) | |
| character:onigiri_(vtuber)_(3rd_costume) | character:onigiri_(vtuber) | |