Characters
- o-tama 5
- o.d 6
- ob nixilis 1
- obanai iguro 36
- obelisk the tormentor 1
- obelix 7
- oberon 114
- oberonia rhea 5
- obi-wan kenobi 34
- obito uchiha 24
- oboro 176
- oboro kashiwagi 2
- obotchaman 3
- obsidius 5
- obstagoon 43
- oceanbird astronomonov 1
- oceanus 2
- oceanus shenron 2
- ochako uraraka 1473
- ochichi-sama 1
- octavia 312
- octavia melody 15
- octavian 2
- octillery 5
- octoling 83
- oczy 1
- oda nobuhime 1
- odalia blight 79
- odd della robbia 3
- odelo henrik 2
- odette spessiva 6
- odin 7
- odion ishtar 9
- odogaron 2
- oerba dia vanille 49
- oerba yun fang 18
- officer jenny 151
- officer yeou 3
- oga 8
- ogama 3
- ogerpon 12
- ogin 11
- ogremon 5
- oguri cap 20
- ohana matsumae 90
- ohga ruki 1
- ohjiro mihara 2
- ohno 1
- ohr 34
- ohse minato 1