Characters
- obstagoon 43
- oceanbird astronomonov 1
- oceanus 2
- oceanus shenron 3
- ochako uraraka 1480
- ochichi-sama 1
- octavia 313
- octavia melody 16
- octavian 2
- octillery 5
- octoling 83
- oczy 1
- oda nobuhime 1
- odalia blight 81
- odd della robbia 3
- odelo henrik 2
- odette spessiva 8
- 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 12
- ogremon 5
- oguri cap 20
- ohana matsumae 90
- ohga ruki 1
- ohjiro mihara 2
- ohno 1
- ohr 34
- ohse minato 1
- oichi 37
- oikawa tsurara 4
- oinari-sama 8
- oinkologne 1
- oiroke 2
- ojou 9
- oka nishizawa 25
- oka yuoji 6
- okaa-san 2
- okada izou 38
- oki 1
- okidogi 6
- okiku 6
- okiku-mushi 1