| Name | Total | ... |
|---|---|---|
| Origami Tobiichi | 2 | GO |
| Original | 1 | GO |
| Orihime Inoue | 46 | GO |
| Orion/Artemis | 2 | GO |
| Orochi | 5 | GO |
| Orochimaru | 1 | GO |
| Orsola Aquinas | 7 | GO |
| Ortlinde NBLG Valkyria | 1 | GO |
| Osakabehime | 10 | GO |
| Osama bin Laden | 1 | GO |
| Oshawott | 1 | GO |
| Oshino Meme | 4 | GO |
| Oshino Shinobu | 54 | GO |
| Osomatsu Matsuno | 2 | GO |
| Oswald | 1 | GO |
| Otako | 6 | GO |
| Otao | 2 | GO |
| Otoha Sakurano | 1 | GO |
| Otohime Ryuuguu | 1 | GO |
| Otome Arisugawa | 1 | GO |
| Otome Asakura | 3 | GO |
| Otonoshin Koito | 0 | GO |
| Otoya Ittoki | 4 | GO |
| Otsuu Tsurugaya | 1 | GO |
| Ouga Saki | 1 | GO |
| Ougi | 1 | GO |
| Ougi Oshino | 1 | GO |
| Ouka Nagisa | 2 | GO |
| Ouroboros | 2 | GO |
| Ovelia Atkascha | 3 | GO |
| Oyashio | 1 | GO |
| Ozen | 3 | GO |
| Ozymandias | 1 | GO |
| Pachira | 3 | GO |
| Pai | 1 | GO |
| Pai Chan | 2 | GO |