List of Marvel Comics characters: O



Main article: O-Force

Kathryn O'Brien

Randy O'Brien

Main article: Randy O'Brien

Blackjack O'Hare

Blackjack O'Hare is a fictional character in Marvel Comics. He was created by Bill Mantlo and Sal Buscema and first appeared in The Incredible Hulk #271 (May 1982).

Blackjack O'Hare is an anthropomorphic hare who is a mercenary and leader of the Black Bunny Brigade. He was hired by Judson Jakes and Lord Dyvyne to kidnap Lylla, the C.E.O. of Mayhem Mekaniks. He planned on betraying his employers by marrying Lylla and inheriting the company, but was found out. He was rescued by Rocket Raccoon and after a series of incidents that caused him to question his own loyalty, he aided Rocket in defeating the tyrants and left with his new friends to start a new life.[1]

All this appeared to be false when Rocket visited Halfworld and discovered that Blackjack, along with Lylla and Wal Rus, were all actually service animals for the mental patients who inhabited the planet. Blackjack married Lylla after Rocket left to ensure the imprisonment of a dangerous criminal.[2]

However, this story was immediately retconned as Blackjack returned as a mercenary and adversary to Rocket and Groot. Blackjack was once again working for Dyvyne with his next assignment being that he kidnap Princess Lynx. Rocket, Groot and Wal Rus arrived to defeat Blackjack, his brigade and Dyvyne, once again.[3]

He turned up once again, disguised as an impostor Rocket and framing him for a series of murders.[4] He reveals his identity to Rocket and claims that the reason for framing him was that he ruined his chance to assassinate Princess Amalya and destroyed his reputation in the process. Ironically, Amalya had become a "General" and arrived with Rocket's ex's in an effort to exterminate him themselves. Blackjack considered the possibility of assassinating her now, but was shot by Amalya because he was talking out loud. As a last ditch effort he fires a missile at Rocket, but it gets deflected and Blackjack is presumably killed.[5]

Alfie O'Meggan

Main article: Alfie O'Meggan

Seymour O'Reilly

Seymour O'Reilly is a Marvel Comics character who first appeared in Amazing Fantasy #15.

He was a wisecracking, bully-wannabe who joined athlete Flash Thompson to pick on unpopular kids such as Peter Parker. When Spider-Man appeared throughout the years, Seymour was still a sort of harasser to Peter as time goes by; for instance, he began playing some pranks on Peter such as putting a "kick-me" sign on his back and trying to give him a "wedgie". He makes a final appearance in the Marvel Knights Spider-Man series in issue #7 where he once again troubles Peter and he meets his demise when he is killed by Angelo Fortunato, the son of crime boss Don Fortunato who became the new Venom. Peter and his wife Mary Jane Watson were questioned by the police regarding O'Reilly's death who arrive at Peter's high school reunion due to O'Reilly's demise.

Other media

Seymour O'Reilly appears as a minor character in The Spectacular Spider-Man, voiced by Steven Blum.

Solomon O'Sullivan

Main article: Solomon O'Sullivan


Main article: Obituary (comics)


Main article: Obliterator (comics)


Main article: Oblivion (comics)

Obnoxio the Clown

Main article: Obnoxio the Clown


Main article: Occulus


Main article: Ocean (Marvel Comics)


Main article: Ocelot (comics)


Main article: Oddball (comics)


Main article: Odin (Marvel Comics)


Aleta Ogord

Aleta Ogord is a 30th-century superhero in the Marvel Universe. The character, created by Steve Gerber, Sal Buscema, and Vince Colletta, first appeared in Defenders #29 in November, 1975.

Within the context of the stories, Aleta is a member of the Guardians of the Galaxy. Aleta was born in the 31st century on the planet Arcturus IV. Due to biochemical advancements by the warlike Reavers and radioactive fallout on the planet, she was born with the power to manipulate light.

Aleta was raised to be aggressive and ruthless by her father. Stakar, her adopted brother, was the more intellectual of the pair. Although she initially resented him, the two eventually fell in love and married. The two traveled to the Forbidden City on Arcturus and discovered a statue of the powerful Hawk God. Aleta accidentally triggered a mechanism in the statue. Her body was turned into energy and merged with Stakar, granting him incredible power.

With this bonding only one of them could exist at any time while the other was locked in Limbo until they swapped places. Stakar remained corporeal for most of the time and took the name Starhawk. Aleta's father Ogord decided to use Starhawk as a weapon, but Aleta and Stakar did not want to be used in such a way. The two left for space and Ogord vowed revenge.

Eventually the two grew lonely in space. Secretly returning to Arcturus they petitioned the Hawk God to temporarily separate them so that they might have children to which the Hawk God agreed. Stakar and Aleta had triplets: Tara, Sita and John. The two were then re-merged, with Aleta remaining to take care of the children.

However things did not remain well. Stakar, wanting to return to space, forcibly took control as Starhawk. The children were secreted away in a home where they could have instant communication with Starhawk. Aleta began to resent Starhawk for taking them away from her children and keeping her locked in Limbo. During his travels through space, Starhawk met and joined the interstellar freedom fighters known as the Guardians of the Galaxy. During the brief periods Aleta was in control she also acted as a member. Aleta's father Ogord later found and abducted his grandchildren, using them in a plot to kill Starhawk. Although the plot failed thanks to the Guardians, the children aged rapidly and died. Aleta never forgave her husband for their loss.

On a later mission Aleta and Starhawk separated, something that had never happened during any of Starhawks past lives. Finally free from her now-hated husband, Aleta divorced him and began a romantic relationship with Vance Astro. Vance reciprocated her feelings and he eventually proposed to Aleta and she agreed to marry him.

Over time the separation from Aleta began to affect Stakar. During her battle with Malevolence he forcibly reabsorbed his ex-wife and fled the team. Although it was Stakar's male form, Aleta's mind was active as well. Another side effect of the forced merger was that Starhawk's physical form was now completely black with stars shining from his body. Aleta could also physically harm her husband by causing him intense pain. The duo could also swap places and while swapped Stakar could physically harm his wife as well.

Unable to live like this the two battled for the right to be Starhawk and Aleta was the victor. She returned Stakar to his infant form to begin his life anew (as he had done many times before) and took his place as Starkhawk. She also forgave him for all his past transgressions.

Aleta rejoined the Guardians, who were attacking the Badoon, and battled a Badoon powered Captain Universe. She drove off the uni-force and saved her teammates and reunited with her love. However all was not well. As the avatar for the Hawk God Aleta found herself growing colder and losing her emotions. When the Guardians went to check on Centauri-IV they found the planet altered. While the Guardians were in the past a change to the timeline was made and the Centauri and Badoon were now merged. Yondu further explained that Starhawk had informed them that the Guardians were coming. Aleta denied this but then the group realized that Yondu did not know Aleta was now the Hawkgod's avatar and watched as Stakar returned and confronted his wife.

While the former husband and wife quarreled the Hawk God watched as his avatars bickered like school children. Finally having enough, he brought the two to him and fused the two at the hands, forcing them to work together. Eventually the Hawk God separated them and Aleta opted to withdraw her petition to be Starhawk as she did not like how emotionless she became while being the Hawk God's avatar. She remained with the Guardians of the Galaxy from then on.

Aleta and Stakar eventually became able to separate again with no ill effects, and she resumed her relationship with Vance. However, without Stakar, she seems to be becoming more cold and ruthless like the other Reavers.


Main article: Ogre (Marvel Comics)


Main article: Ogress (comics)


Main article: Ogun (comics)


Okoye is a member of the Dora Milaje and first appeared in Black Panther Vol. 3 #1. She joined alongside her friend Nakia to be among T'Challa's wives-in-training. However, when Okoye discovered that T'Challa had no interest in marrying anyone of them, Okoye immediately came to accept this.[6] She has since stood at T'Challa's side preferring only to speak in Hausa. Okoye accompanied T'Challa when he recruited Queen Divine Justice.[7] She was also with T'Challa when they tested Kasper Cole on whether he was worthy of the Black Panther garb. Okoye herself tested Kasper if he would stay with his pregnant girlfriend or leave her for Okoye.[8]

In other media

Okoye is set to appear in Black Panther where she will be played by Danai Gurira.[9]

Old Lace

Main article: Old Lace (comics)

Old Skull

Old Skull is a freedom fighter and member of Killraven's Freemen in a post-apocalyptic alternate future of the Marvel Universe.

The character, created by Marv Wolfman and Herb Trimpe, first appeared in Amazing Adventures vol 2, #20 (September 1973) and continued to appear in most issues of the title through #39.

Within the stories, Old Skull is born in 1987 in an alternate-future Earth designated Earth-691 by Marvel Comics. In 2001 he is enslaved by the Martians and put to work as a laborer converting existing buildings into Martian bases. Eventually he is consigned to the gladiatorial arena and becomes a champion by 2010. He meets Killraven in the Madison Square Garden Arena in 2014. Eventually the pair escape from the Gladiatorial Institute, and Old Skull joins Killraven's Freemen.

Much later, Old Skull is bitten by a zombie created when the cross-reality traveling Machine Man and Howard the Duck unleash a zombie infestation to drive the Martians from Earth. Killraven successfully manages to avoid his transformation into a zombie by severing the arm.[10]



Main article: Omega (Marvel Comics)

Michael Pointer

Omega Red

Main article: Omega Red

Omega the Unknown

Main article: Omega the Unknown


Main article: Paulie Provenzano

One Above All

The One Above All is a Celestial in the Marvel Universe. The character, created by Jack Kirby, first appeared in The Eternals #7 (January 1977).

Within the context of the stories, the One Above All is the leader of the Celestials and is present during the Fourth Host to visit Earth.[11][12]

Another character that is also called "The One Above All" is the most powerful character In the entire Marvel franchise. This entity is omnipotent, omniscient, and omnipresent, and is responsible for the existence of all life in the Marvel Multiverse. The One-Above-All is the master of the cosmic overseer and arbitrator known as the Living Tribunal. This character is also known as "Above-All-Others", exists beyond time and space, and alternates between appearing as a male and female.[13]

Oneg the Prober

Oneg the Prober is a Celestial in the Marvel Universe. The character, created by Jack Kirby, first appeared in The Eternals #9 (March 1977).

Within the context of the stories, Oneg is a Celestial tasked with experimentation and implementation. He is present during at least the First[14] and Fourth Hosts to visit Earth.[12][15]

Other versions of Oneg

The character has been established as a recurring element in Marvel's in-story cosmology and has appeared in various alternate reality stories and titles such as Earth X.


Imperial Guard

Charles Xavier/Max Eisenhardt

Main article: Onslaught (comics)


Main article: Onyxx (comics)


Main article: Ooze (comics)


Main article: Gene Nation


Main article: Optoman



Main article: Orator (comics)


Main article: Orb (comics)

Drake Shannon



Main article: Orbit (comics)


Main article: Orchid (comics)


Main article: Ord (comics)


Orikal is a fictional character in the Marvel Universe. He first appeared in Thor #138-139 (March–April 1967), and was created by Stan Lee and Jack Kirby.

The character subsequently appears in Thor #9 (March 1999), #14 (August 1999), #20 (February 2000), #22-25 (April–July 2000), and #41-42 (November–December 2001).

Orikal is an extra-dimensional being who has mystical powers so vast that they can nullify the power of Odin. Orikal has incredibly advanced scientific knowledge, and his "Infinite Eye" can see everything that is happening in the world he is in, as well as what will happen in its alternate futures.

Orikal was trapped within a sea of flame by Geirrodur, King of the Trolls. Geirrodur coerced Orikal into providing information on how to build advanced weaponry, which the trolls used to invade Asgard. The trolls used one of their devices to drain the power from Odin's scepter, and the Asgardians were on the verge of defeat. Thor and Sif managed to find Orikal but Ulik tried to kill Orikal. Thor defeated Ulik and freed Orikal, who transformed into energy and shot out into space.[16]

Orikal later became enslaved by Geirrodur once again. He provided information to Thor, Ulik, Odin, and assisted Thor's efforts to defeat Mangog and prevent Thanos from using the Chalice of Ruins and the tears of the Designate to gain vast power and destroy all life in the cosmos.


Main article: Orka (comics)


Main article: Orphan (comics)


Main article: Orphan-Maker


Main article: Orrgo

Armena Ortega

Armena Ortega is a fictional mutant character in the Marvel Comics Universe. Her first appearance was in District X #2.

Armena is the wife of Ismael Ortega. She was depowered as a result of M-Day. She generated a protective gelatinous coating while she slept.

Ishmael Ortega

Main article: Ishmael Ortega


Orwell is a mutant in the Marvel Comics Universe. His first appearance was in The Brotherhood #1.

Orwell was mute, but could communicate through telepathy. At some point he had lost his left eye in an unexplained situation. He was Hoffman's second in command and shadow. He was one of the founding three of the Brotherhood, along with Hoffman and Marshal, but stuck with Hoffman when Marshal left. It was revealed he was working with Marshal all along, and Hoffman hit him with a massive energy blast.

Amberson Osborn

Amberson Osborn is a Marvel Comics character introduced in The Spectacular Spider-Man Annual #14 (June 1994). He was Norman Osborn's father. Amberson was a brilliant inventor, but lost the family fortune when his invention was stolen yet often "blamed others for his failures". Unfortunately for Norman and his mother (Amberson's wife), he began abusing alcohol after realizing that he was cheated. Amberson lashed out at and verbally abused Norman, and even hit his wife when she came to their young son's defense. Amberson also locked Norman in an abandoned family mansion to force his son to "face the darkness" and made him stay there throughout the night during an intense rain storm which traumatized Norman from the apparent cackling of a green goblin-like creature.

Alternate versions of Amberson Osborn

The Ultimate Marvel version of Amberson Osborn is briefly seen as Harry Osborn's legal guardian after Norman Osborn's transformation and Martha Osborn's death.[17]

Emily Osborn

Emily Osborn is a Marvel Comics character introduced in The Spectacular Spider-Man #180 (September 1991). She was Norman Osborn's wife and Harry Osborn's mother. Emily was apparently the only person that Norman ever showed love to but their son's birth had weakened her, and she died sometime after.[18]

Alternate versions

Her character's Ultimate Marvel version is renamed Martha Osborn. Martha is killed by a muscular, grotesque, demonic-like monster.[19][20]

Emily Osborn in other media

In the 2002 Spider-Man movie, a picture of Emily Osborn can be seen in Norman Osborn's room. It's revealed that she left Norman and Harry, taking some of Norman's money; Norman believes Harry's girlfriend Mary Jane is just another gold-digger.

Emily Osborn makes cameo appearances in The Spectacular Spider-Man cartoon series episodes "Competition", "Blueprints" and "Final Curtain". She hasn't said a single word in the entire series. She doesn't appear interested in anything that's going on around her, nor does she listen to her son when he made the football team. She was briefly considered a suspect as the true identity of the Green Goblin. if the series was picked up for a third season, she would have been played by Marina Sirtis

Harry Osborn

Main article: Harry Osborn

Norman Osborn

Main article: Norman Osborn

Normie Osborn

Main article: Normie Osborn


Main article: Oshtur




Main article: Oswald (comics)


Main article: Otomo (comics)


Main article: Outlaw (comics)

Outlaw Kid

Main article: Outlaw Kid


Main article: Overdrive (comics)


Main article: Overkill (comics)


Main article: Overmind (comics)


Oswald is a fictional character, a mutant in the Marvel Comics Universe. His first appearance was in The Brotherhood #1.

The young mutant known as Oswald gained his mutant powers at puberty. At some point, he became involved with the militant mutant terrorists, The Brotherhood and its enigmatic leader, Hoffman.

In a disco at Moscow, Oswald lamented his life, before blowing the place up. After stumbling out, Hoffman congratulated him on a job well done. Later, in England, Oswald appeared with Hoffman, putting a stop to the beating of a mutant by an angry crowd. After Hoffman cooled down the crowd and walked off with Fagin and Mike Asher, Oswald blew up the street and the gathered crowd.

Oswald's mutant ability allows him to cause very large explosions, which he is immune to.


For the Spider-Man villain formerly known as Override, see Gregory Herd.

Overrider (Richard Rennselaer) is a fictional mutant in the Marvel Comics Universe. His first appearance was in Captain America Annual #8.

Richard Rennselaer is a former S.H.I.E.L.D. agent whose son developed nuclear psychosis, a total withdrawal from reality due to a fear that the world will end at any moment due to nuclear destruction.

Desperate to help his son, Rennselaer (secretly a mutant with the power to control machinery) took on the codename of "Overrider" and stole the experimental TESS-One robot - part of a 1939 project dubbed Total Elimination Of Super-Soldiers which was intended to be a failsafe against the Super Soldier program. Overrider had the TESS-One robot coated with adamantium at the Adametco Metallurgy company, and it was there he first encountered Captain America and Wolverine, each who had been following different leads. Overrider escaped with TESS-One, and later mounted an assault on a nuclear command facility in the hope of launching America's entire stockpile of nuclear missiles and burying them in the ocean floor, not caring that Moscow may interpret the launch as an attack on the Soviet Union. Captain America and Wolverine teamed up to defeat TESS-One, and then encountered Overrider as he was about to launch the missiles. Captain America knocked Overrider off his flying sled with his shield, and Wolverine almost impaled him on his claws as he fell, choosing instead at the last second to let Overrider fall to the floor. Overrider was quickly given medical attention and then taken into custody. Overrider was depowered thanks to the effects of M-Day.


Main article: Ozone (comics)


Main article: Owl (Marvel Comics)


Main article: Ox (comics)

Raymond Bloch

Ronald Bloch


Main article: First Line (comics)


Main article: Oya (comics)



  1. Rocket Raccoon #1-4
  2. Annihilators #3
  3. Free Comic Book Day Rocket Raccoon
  4. Rocket Raccoon Vol. 2 #1
  5. Rocket Raccoon Vol. 2 #4
  6. Black Panther vol. 3 #11
  7. Black Panther Vol. 3 #25
  8. Black Panther Vol. 3 #62
  9. Strom, Marc (July 23, 2016). "SDCC 2016: Marvel's 'Black Panther' Confirms Additional Cast". Archived from the original on July 23, 2016. Retrieved July 23, 2016.
  10. Fred Van Lente (w), Kano (p). Marvel Zombies 5 2 (June 2010), Marvel Comics
  11. Jack Kirby (w), Jack Kirby (p), John Verpoorten (i). "The Fourth Host" The Eternals 7 (January 1977)
  12. 1 2 Mark Gruenwald, Ralph Macchio (w), Keith Pollard (p), Gene Day (i). "Chapter One Twilight of the Gods!" Thor 300 (October 1980), Marvel Comics
  13. Thanos: The Infinity Finale (April, 2016)
  14. Mark Gruenwald (w), Ron Wilson (p), Chic Stone (i). "The First Celestial Host!" What If... 23 (October 1980), Marvel Comics
  15. Jack Kirby (w), Jack Kirby (p), Mike Royer (i). "The Killing Machine" The Eternals 9 (March 1977)
  16. vol. 1, issue 139, 1966
  17. Ultimate Spider-Man #73
  18. The Spectacular Spider-Man #180
  19. Ultimate Spider-Man #3
  20. Ultimate Spider-Man #4
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