| character:ocean_song_zeri | character:zeri_(league_of_legends) | |
| character:ochi_the_duck_(myumon) | character:ochi_the_duck | |
| character:octavia_melody_(equestria_girls) | character:octavia_melody | |
| character:octoling_boy | character:octoling_player_character | |
| character:octoling_girl | character:octoling_player_character | |
| character:oda_kippoushi_(fate) | character:oda_nobunaga_(fate) | |
| character:oda_nobunaga_(koha-ace) | character:oda_nobunaga_(fate) | |
| character:oda_nobunaga_(maou_avenger)_(fate) | character:oda_nobunaga_(fate) | |
| character:oda_nobunaga_(swimsuit_berserker)_(fate) | character:oda_nobunaga_(fate) | |
| character:odette_widowmaker | character:widowmaker_(overwatch) | |
| character:odile_widowmaker | character:widowmaker_(overwatch) | |
| character:odin_(black_strokes_upon_blank_snow)_(azur_lane) | character:odin_(azur_lane) | |
| character:odyssey_aatrox | character:aatrox | |
| character:odyssey_jinx | character:jinx_(league_of_legends) | |
| character:odyssey_kayn | character:kayn_(league_of_legends) | |
| character:odyssey_malphite | character:malphite | |
| character:odyssey_sona | character:sona_(league_of_legends) | |
| character:officer_caitlyn | character:caitlyn_(league_of_legends) | |
| character:officer_d.va | character:d.va_(overwatch) | |
| character:officer_vi | character:vi_(league_of_legends) | |
| character:officer_williams_bangalore | character:bangalore_(apex_legends) | |
| character:offset_spanner_m36_(ole_tower) | character:offset_spanner_(ole_tower) | |
| character:ogerpon_(cornerstone_mask) | character:ogerpon | |
| character:ogerpon_(hearthflame_mask) | character:ogerpon | |
| character:ogerpon_(teal_mask) | character:ogerpon | |
| character:ogerpon_(wellspring_mask) | character:ogerpon | |
| character:ognevoy_(blue_nova)_(azur_lane) | character:ognevoy_(azur_lane) | |
| character:oguri_cap_(gray_monster)_(umamusume) | character:oguri_cap_(umamusume) | |
| character:oguri_cap_(miraculous_white_star)_(umamusume) | character:oguri_cap_(umamusume) | |
| character:oguri_cap_(run_run_run!!)_(umamusume) | character:oguri_cap_(umamusume) | |