| Characters starting with an O | ||
| Oberon | ||
| Obi-Wan Kenobi | ||
| Officer (and Gentleman) | ||
| Ogre | ||
| Oktoberfest Celebrant | ||
| Oliver Cromwell | ||
| Oliver Hardy | ||
| Olivia Newton John (grease) | ||
| Opera Singer | ||
| Operation | ||
| Ophelia | ||
| Orangutan | ||
| Organ Donor | ||
| Oriental | ||
| Orion slave girl | ||
| Orphan | ||
| Orphan Annie | ||
| Orpheus | ||
| Osama Bin Laden | ||
| Oscar Wilde | ||
| Osmonds | ||
| Outlaw | ||
| Owl | ||
| Ozzy Osbourne | ||