Characters
Every character indexed in a story, from headliners to one-panel walk-ons.
- Michael O'Brian — Le Garde
- Ann O'Brien
- Ann O'Brien — Dark Horse, amie de Monkeyman
- Bernard O'Brien — policeman, Marvel
- Bernard O'Brien — polícia; Marvel
- Bernard O'Brien — Marvel, agent de police
- Brian O'Brien — The Clock
- O'Brien, Jr. — Pre-Crisis Earth-Twelve, Plastic Man Jr.
- Keiko O'Brien — from Star Trek
- Kevin O'Brien — Guardsman, Marvel
- Michael O'Brien — Guardsman, Marvel
- Miles O'Brien — from Star Trek
- Molly O'Brien — from Star Trek
- Randy O'Brien — Antibody, New Universe
- Turlogh Dubh O'Brien — Black Turlogh
- Seamus O'Brienn — WildStorm / Image
- Bob O'Bryan — from It! The Living Colossus, Marvel
- Colin O'Carr — Astro City
- Lance O'Casey — Fawcett
- Danny O'Connell — Katy Keene / Archie Comics
- Jeannine O'Connell — Project P.E.G.A.S.U.S.
- Taryn O'Connell — from U.S. 1, Marvel
- Travis O'Connell — of the Linear Men
- O'Connor — uit Buck Danny
- Candy O'Connor — from Quality
- Mark O'Connor — from Batman
- Pudge O'Connor — Four Comrades, Standard/Better/Nedor
- Barry O'Dare — DC character
- Clarence O'Dare — DC character
- Hope O'Dare — DC character
- Mason O'Dare — DC character
- Matt O'Dare — DC character
- Angel O'Day — from Angel and the Ape
- Angles O'Day — from Quality
- Bubbles O'Day — Marvel, The Conspiracy
- Mode O'Day
- Patty O'Day
- Cricket O'Dell — Archie
- Jack O'Diamonds — Jack Winters
- O'Donnell — Princess Bar; Madripoor
- O'Donnell — Princess Bar; Madripoor, Marvel
- O'Donnell — Princess Bar, Madripur
- Agent O'Donnell — FBI, from Brute Force, Marvel
- Eamon O'Donnell — Marvel
- Knight O'Donnell — Checkmate, DC
- Trace O'Donnell — Top Cow / Image
- Patty O'Donnels — Marvel
- Officer O'Doone — Marvel, Georgie feature
- Duke O'Dowd — Human Meteor
- Downy O'Drake
- Jack O'Finagle — from the Futurians
- Anja O'Flanagan — Brendon D'Arkness
- Officer O'Floodle — from Stumbo
- O'Fünfuhrteefix
- Heather O'Gara — Jackdaw / Blackbird
- Chief O'Grady — NYPD, Code: Blue, Marvel
- Eric O'Grady — Ant-Man
- Eric O'Grady — Life-Model Decoy; Ant-Man / Black Ant
- Eric O'Grady — Ant-Man
- Eric O'Grady — Hangya
- Eric O'Grady — Ant-Man
- Daniel O'Halloran — Power Rangers
- Grace O'Halloran — journalist, Batgirls
- Paddy O'Hanlon — Gael
- Paddy O'Hanlon — Celta
- Shanna O'Hara Plunder — Shanna the She-Devil, Marvel
- Shanna O'Hara Plunder — Shanna, Mulher-Demônio
- Shanna O'Hara Plunder — Frau von Ka-Zar / Marvel
- Angel O'Hara — Marvel
- Angel O'Hara — possessed by Lilith, Marvel
- Chief O'Hara — GCPD, from Batman
- Chief O'Hara — first name unknown, Batman '66
- Clancy O'Hara — Gotham City police official
- Conchata O'Hara — Marvel, typically from 2099 universes
- Gabriel O'Hara — Firelight, typically from 2099 universes
- Gabriel O'Hara — Terre-928 (2099)
- George O'Hara — Marvel, Earth-928
- Gerald O'Hara — from Shanna, the She-Devil
- Hank O'Hara — from G.I. Joe
- Helen O'Hara — Headhunter
- Martin O'Hara — Marvel
- Miguel O'Hara — Spider-Man 2099
- Miguel O'Hara — Spider-Man, Terre-928 (2099)
- Miguel O'Hara — Tierra-928 (2099)
- Miguel O'Hara — Spider-Man
- Mr. O'Hara — from Scribbly
- Patrick O'Hara — Web-Slinger, typically from Earth-31913
- Patrick O'Hara — Marvel, Le Lanceur de toiles, typiquement de la Terre-31913
- Robert O'Hara — Marvel
- Rose O'Hara — Wolverine: The Origin
- Shana O'Hara — from G.I. Joe, Real American Hero
- Shana O'Hara — Scarlett, de la série G.I. Joe
- Shana O'Hara — Scarlett, G.I Joe, IDW-main
- Shana O'Hara — Scarlett, G.I Joe, generic
- Tim O'Hara
- Ariel O'Hare — Marvel
- Blackjack O'Hare — Marvel, rabbit mercenary
- Bridget O'Hare — Sea Witch
- Bucky O'Hare — from Continuity Comics
- Kaitlyn O'Hare — Backstabber, Ultraverse
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