Characters
Every character indexed in a story, from headliners to one-panel walk-ons.
- Overkill — Transformers, Marvel
- Overkill — Taserface, of the Stark, typically of Earth-691
- Overkill — Robert Skelton, G.I. Joe
- Overload — Transformers, archetype
- Overload — Transformers, Armada/Energon
- Overload — Transformers, G1, Dreamwave
- Overlord — Antonio Seghetti
- Overlord — G.I. Joe
- Overlord — Earth-6966; Rakkhal
- Overlord — Flash Mercury
- Overlord — Antonio Seghetti / Vicious Circle
- The Overlord — the original Overlord, from Lords of the Ultra-Realm
- The Overlord — Savage-Falkon, from Lords of the Ultra-Realm
- Overmaster — DC villain
- Overmind — Grom
- The Overmind — Professor Emil Hamilton
- Override — Marvel, Greg Herd
- Override — Transformers, archetype
- Override — Transformers, G1, Dreamwave
- Override — Transformers, Marvel
- Override — Transformers: Generation 2
- Override — Transformers, IDW
- Override — Marvel, Greg Herd
- Override — Greg Herd
- Overrider — Richard Rennselaer, Marvel
- Overt-Kill — Spawn
- OvertKill — Image, Nicholas Rocca
- Overthrow — Arnold Beck, DC
- Overtime — Marvel, Hector Bautista
- Overwatch
- Ovid — Harrowers, Hellraiser
- Simon Ovronnaz — uit Largo Winch
- Owayodata — Marvel
- Owein — Marvel
- Cory R. Owens — G.I. Joe, Lightfoot
- Cory R. Owens — Lightfoot, de la série G.I. Joe
- Kevin Owens — professional wrestling
- Robert D. Owens — G.I. Joe, Major Altitude
- Owl — Leland Owlsley
- The Owl — Bruce Wayne
- Owl — Astro City
- Owl — Simon Hanselmann
- Owl — Disney Winnie the Pooh
- Owl — from the Shroud, AC
- Owl Girl — Western / Dell; Belle Wayne
- Owl Girl — Gold Key; Laura Holt
- Owl Girl — Dynamite; Megan Keller
- Ollie Owl — Looney Tunes
- Ozzie Owl — from Ozzie Owl
- Professor Oswald Owl — from Peter Panda
- The Owl — Western / Dell; Nick Terry
- Owl-Man — Post-Crisis Qward, Crime Syndicate, 1992
- Owlman — Pre-Crisis Earth-Three, Crime Syndicate, 1964-1985
- Owlman — Thomas Wayne Jr., Post-Crisis Antimatter Earth, Crime Syndicate, 2000-2011
- Owlman — Thomas Wayne Jr., Post-Crisis Earth-3, Crime Society/Syndicate, 2007-present
- Owlman — Roy Raymond Jr.
- Owlman — Dick Grayson
- Owlman — Thomas Wayne Jr., Post-Crisis Antimatter Earth, Crime Syndicate, 2000-2011, DC
- Leland Owlsley — Owl
- Leland Owlsley — Le Hibou
- Leland Owlsley — Die Eule / Owl
- Owlwoman — Wenonah Littlebird
- Owly — from Owly, by Andy Runton
- Jim Owsley — Marvel creator
- Ox — Karl Stragg
- Ox — Raymond Bloch
- Ox — Marvel, Bruno Sanchez, typiquement de la Terre-1610
- Ox — Bruno Sanchez, typically from Earth-1610
- Ox — China Force, Marvel
- Ox — Ronald Bloch, brother of original Ox
- Ox — Dr. Karl Stragg
- Oxala
- Oxala
- Oxbow — Sam Matonabbe, First Line, Marvel
- Oxdjävulen
- Oxford Blue — Preston Allen, Euro-Trash, Marvel
- Oxo — Marvel, Special Executive
- Oya — Idie Okonkwo, Marvel
- Kazuo Oyama — Marvel, Lord Deathstrike
- Kenji Oyama — Dark Wind
- Yuriko Oyama — Lady Letal
- Yuriko Oyama — Lady Deathstrike
- Yuriko Oyama — Lady Deathstrike
- Castor Oyl — from Popeye, Olive's brother
- Castor Oyl
- Cole Oyl — from Popeye, Olive's father
- Cylinda Oyl — from Popeye, wife of Castor Oyl
- Nana Oyl — from Popeye, Olive's mother
- Olive Oyl — Popeye's girlfriend
- Oz — from Buffy, Dark Horse
- Oz — from Buffy
- Oz — Dark Horse, Buffy
- Oz — from Ramsey's Raiders
- Oz — from Oz stories, generic
- Oz — from Stardust, AC
- Ozai — Avatar, the Last Airbender
- Lord Ozaki — from Frank Miller's Rōnin
- Ozark — Lug/Semicverse, Russell Red Horse
- Ozewiezewozewiezewallakristallix — Asterix
- Ozma — from Oz stories, generic
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