| character:oasis_symmetra | character:symmetra_(overwatch) | |
| character:oberon_(moody_summer_oberon)_(fate) | character:oberon_(fate) character:oberon_(third_ascension)_(fate) | |
| character:oberon_(overnight_dream)_(fate) | character:oberon_(fate) character:oberon_(third_ascension)_(fate) | |
| character:oberon_(refreshing_summer_prince)_(fate) | character:oberon_(fate) | |
| character:oberon_(third_ascension)_(fate) | character:oberon_(fate) | |
| character:obkatiekat_(1st_costume) | character:obkatiekat | |
| character:obkatiekat_(2nd_costume) | character:obkatiekat | |
| character:oblivionis_(bang_dream!) | character:togawa_sakiko | |
| character:oboro_(10th_anniversary)_(kancolle) | character:oboro_(kancolle) | |
| character:oboro_(11th_anniversary)_(kancolle) | character:oboro_(kancolle) | |
| character:oboro_(7th_anniversary)_(kancolle) | character:oboro_(kancolle) | |
| character:oboro_(8th_anniversary)_(kancolle) | character:oboro_(kancolle) | |
| character:oboro_(9th_anniversary)_(kancolle) | character:oboro_(kancolle) | |
| character:oboro_(bridal)_(fire_emblem) | character:oboro_(fire_emblem) | |
| character:oboro_(christmas_mode)_(kancolle) | character:oboro_(kancolle) | |
| character:oboro_(halloween_mode)_(kancolle) | character:oboro_(kancolle) | |
| character:oboro_kai_(kancolle) | character:oboro_(kancolle) | |
| character:oboro_(round_one)_(kancolle) | character:oboro_(kancolle) | |
| character:oboro_(sasebo_2018)_(kancolle) | character:oboro_(kancolle) | |
| character:oboro_(sasebo_2023)_(kancolle) | character:oboro_(kancolle) | |
| character:oboro_(setsubun)_(kancolle) | character:oboro_(kancolle) | |
| character:oboro_(valentine)_(kancolle) | character:oboro_(kancolle) | |
| character:oboro_(yukata_mode)_(kancolle) | character:oboro_(kancolle) | |
| character:obr_(envoy_of_spring)_(girls'_frontline) | character:obr_(girls'_frontline) | |
| character:obr_(mod3)_(girls'_frontline) | character:obr_(girls'_frontline) | |
| character:obr_(queen_of_castile)_(girls'_frontline) | character:obr_(girls'_frontline) | |
| character:ocean_song_ashe | character:ashe_(league_of_legends) | |
| character:ocean_song_nidalee | character:nidalee | |
| character:ocean_song_seraphine | character:seraphine_(league_of_legends) | |
| character:ocean_song_yone | character:yone_(league_of_legends) | |