Fictional Characters that Start with O: Biggest in History

The most remarkable and unforgettable characters are usually those that incorporate almost every attribute a human can possibly have. From imperfect heroes and charming losers to psychopaths and smooth talkers, we adore these characters because more than anything, we see glimpses of our lives in them personified, and we understand ourselves more since cinema is but a lens into reality. In today’s article, I have compiled a list of the biggest fictional characters in history whose names start with O.

40. Ozai (Avatar: The Last Airbender)

Ozai was the ruler of the Fire Nation during the final years of the Hundred Year War, reigning as Fire Lord from 95 to 100 AG. He was the second son of Fire Lord Azulon and Ilah, the younger brother of Iroh, uncle of Lu Ten, husband to Ursa, the father of Prince Zuko and Princess Azula, and the paternal grandfather of Izumi.

39. Olivier Mira Armstrong (Fullmetal Alchemist: Brotherhood)

Olivier Mira Armstrong, also known as Major General Armstrong, is the primary heir to the illustrious Armstrong family, the commanding officer charged with the protection of Amestris’ northern border at Fort Briggs, and the older sister of Alex Louis Armstrong. Olivier is a severe woman who has a fearsome and commanding presence where she is harsh with her subordinates and peers and coldly merciless to her enemies, the deceptively beautiful woman’s schadenfreude has earned her the nickname “Ice Queen” among the Briggs soldiers. 

38. Ochaco Uraraka (My Hero Academia)

Ochaco Uraraka, also known as Uravity, is a student in Class 1-A at U.A. High School, training to become a Pro Hero and one of the major protagonists of My Hero Academia. At first glance, Ochaco doesn’t seem like one of the strongest combatants, but over the course of her time at U.A. High School, she has drastically improved her combat prowess to become a very capable combatant. 

37. Ophelia (Hamlet)

Although Ophelia is one of the least fully-realized female characters in Shakespeare she is probably the most interesting and relevant regarding current gender relations. At a time when Western women struggle to establish their position in this part of the 21st century, Ophelia speaks quite directly to our generation about their plight, which still has not been resolved. 

36. Ocean Master (DC Comics)

Ocean Master is the evil half-brother of Aquaman who is determined to usurp the throne of Atlantis by employing piracy and terrorism to reach his goals. His powerful mystic abilities are channeled through his trident, although he also has access to technology and many other weapons. 

35. Olivia Dunham (Fringe)

Olivia Dunham is an FBI special agent who was recruited by Philip Broyles to be part of the Fringe Division of the FBI, where she spearheaded several investigations of paranormal events related to The Pattern, alongside Peter Bishop and his father, Dr. Walter Bishop. She is the central character of the series. 

34. Olaf (Frozen)

Olaf is a major character in Disney‘s 2013 animated feature film Frozen and its 2019 sequel. He is a benevolent enchanted snowman created by Elsa and along with the ability to reassemble his body, Olaf’s most prominent quirk is his love for summer and all things hot. 

33. Orson Krennic (Star Wars)

Orson Callan Krennic was a human male who served as Director of the Imperial Military Department of Advanced Weapons Research, which belonged to Imperial Intelligence and the Imperial Security Bureau during the Imperial Era.

32. Okoye (Marvel Comics)

Okoye is the General of the Dora Milaje and the head of Wakandan armed forces and intel. Witnessing T’Challa’s coronation, she joins him in tracking down Ulysses Klaue and after Erik Killmonger overthrew T’Challa, Okoye found herself conflicted between her friendship with T’Challa and her duty to her new king. 

31. Orell (A Song Of Ice And Fire)

Orell was a wildling warg, who could assume the consciousness of an eagle that he used for reconnaissance. Orell is among the party that reaches the Fist of the First Men alongside Jon Snow and Mance Rayder. 

30. Othell Yarwyck (A Song Of Ice And Fire)

Othell Yarwyck is the First Builder of the Night’s Watch and a member of House Yarwyck, a noble house of the Westerlands sworn to Casterly Rock. He is based at Castle Black and is tasked with organizing the builders in maintaining the Wall and the castles belonging to the Watch. 

29. Olly (A Song Of Ice And Fire)

Olly was a farm boy from the Gift who fled to the Night’s Watch after his village was attacked by the Free Folk. He participates in the Battle of Castle Black and becomes the personal steward of Jon Snow. 

28. Olenna Tyrell (A Song Of Ice And Fire)

Lady Olenna Tyrell was the elderly matriarch of House Tyrell and the last known head of that house. Lady Olenna had been a mistress of court politics, plotting, and intrigue par excellence throughout her life and was also known for her wit and sarcasm, resulting in her popular nickname, the Queen of Thorns, in reference to the Tyrell sigil – a rose – and her cutting, barbed comments.

27. Old Nan (A Song Of Ice And Fire)

Old Nan is an elderly woman living in Winterfell. She is a retired servant of House Stark known for her tale-telling abilities and has entertained the children of Eddard and Catelyn with stories throughout their childhoods. 

26. Osha (A Song Of Ice And Fire)

Osha was a woman of the Free Folk in service to House Stark of Winterfell. She later became the bond and sworn protector of Bran Stark and Rickon Stark after the Sack of Winterfell. 

25. Obara Sand (A Song Of Ice And Fire)

Obara Sand was the eldest child of Prince Oberyn Martell, one of the Sand Snakes, and a formidable warrior. Along with Ellaria Sand, the paramour of her father, and her half-sisters Nymeria Sand and Tyene Sand, she takes part in the Coup in Dorne, during which they seize power in Dorne from the legitimate House Martell.

24. Odie (Garfield)

Odie is the pet dog of Jon Arbuckle, the best friend/companion of Garfield, and the tritagonist of the Garfield franchise. Odie is the only animal character in the Garfield series without a recurring voice bubble, as he is portrayed as a “normal” house dog.

23. Oscar Proud (The Proud Family)

Oscar Proud is one of the main characters from The Proud Family franchise. He is the owner of a factory named Proud Snacks (which makes anybody who eats them sick, except Peabo, who is the only person who likes them). 

22. Orville (The Rescuers)

Orville is a supporting character from Disney’s 1977 film The Rescuers and is also the brother of Wilbur from the sequel. Orville takes his job of flying with pride and compared to his brother Wilbur, he is a bit more serious, but can also be funny as well as a bit clumsy. 

21. Oswald (Oswald The Lucky Rabbit)

Oswald the Lucky Rabbit (or simply Oswald) is an animated character created by Walt Disney and Ub Iwerks for Universal Pictures. First appearing in the short film Trolley Troubles on September 5, 1927, Oswald is notable for his ability to disassemble and reshape his body parts at will. 

20. Oliver Wood (Harry Potter)

Oliver Wood was a wizard who was the Keeper and Captain of the Gryffindor Quidditch team during his time as a student at Hogwarts School of Witchcraft and Wizardry, which he attended from 1987 to 1994. Oliver was known for his determination and skill on the playing field, and his long lectures before practices, and he eventually led the Gryffindor team to victory in the Quidditch Cup in his seventh year.

19. Olympe Maxime (Harry Potter)

Madame Olympe Maxime was a French half-giant witch and was the headmistress of Beauxbatons Academy of Magic. Maxime’s preferred mode of transportation was to travel with her students in a powder-blue carriage drawn by twelve winged Abraxan horses, which were bred at Beauxbatons Academy.

18. Olive Oyl (Popeye)

Olive Oyl is a character created by Elzie Crisler Segar in 1919 for his comic strip Thimble Theatre, eventually renamed after Popeye following the sailor’s introduction and popularization. Initially the joint protagonist of Thimble Theatre alongside her childhood sweetheart and longtime boyfriend, the now-obscure Ham Gravy, Olive was retooled by Segar into Popeye’s girlfriend, a role she maintains within all subsequent media and merchandise stemming from Segar’s strip, as the sailor became the strip’s central character in 1930,

17. Oscar Martinez (The Office)

Oscar Martinez is a fictional character played by Oscar Nunez on The Office and is an accountant at the Scranton branch of Dunder Mifflin. Oscar is Mexican-American; the son of parents born in Mexico, and his parents moved to the United States a year before he was born.

16. Oliver Queen (DC Comics)

Oliver “Ollie” Queen is the Green Arrow, a vigilante who uses a bow and arrow to fight crime at a street level while espousing socially liberal values. As the young heir to a billion-dollar corporate dynasty at Queen Industries, Oliver Queen was a wild socialite, and his behavior so shamed his father Robert that he was relegated to clerical work on an oil rig in the Pacific. 

15. Ofelia (Pan’s Labyrinth)

Ofelia is the main protagonist of the 2006 Spanish fantasy drama film Pan’s Labyrinth and was portrayed by Ivana Baquero. Ofelia is an eleven-year-old girl who is living in wartime Spain and, after her father dies, is sent to live with her new stepfather, the powerful fascist officer Captain Vidal.

14. Orochimaru (Naruto)

Orochimaru is one of Konohagakure’s legendary Sannin whose life ambition is to learn all of the world’s secrets and thus seeks immortality so that he might live all of the lives necessary to accomplish his task. After being caught red-handed performing unethical experiments on his fellow citizens for the sake of this immortality, Orochimaru defected from Konoha rather than be persecuted for his ambitions, and for many years sought the village’s destruction in order to take revenge and demonstrate what he had learned. 

13. Oswald Cobblepot (DC Comics)

Oswald Cobblepot is The Penguin, a fancy criminal and self-styled entrepreneur, who uses his business as a front to cover his criminal activities. Penguin started as many criminals do in Gotham City, by performing crimes with a specific theme surrounding birds which made him a frequent enemy of Batman. 

12. Olivia Pope (Scandal)

Olivia Carolyn Pope worked at the White House as a communications director. She later quit the job and founded her own consulting firm Olivia Pope & Associates, which is now renamed “Quinn Perkins and Associates” after being given to Quinn. 

11. Oberyn Martell (A Song Of Ice And Fire)

Prince Oberyn Martell, also known as the Red Viper of Dorne, was a member of House Martell, the ruling family of Dorne, the younger brother of Doran Martell and the late Elia Martell, the father of eight bastard girls known as the Sand Snakes, and a member of the small council for Dorne to Tommen I. He was renowned for his skill with a staff, his spirit for vengeance, and his fluid sexuality. 

10. Ozymandias (DC Comics)

Adrian Veidt, better known as Ozymandias, was a man born with a genius intellect who became an acrobatic and highly intelligent vigilante, idolizing the warrior and leader Alexander the Great and the great Egyptian Pharaoh Ramesses II, granting himself the latter’s Greek name.

After retiring from crimefighting, he built the massive commercial empire of Veidt Enterprises, and used it to further his own self-image as well as save the world from nuclear annihilation by tricking the human race into thinking that aliens were invading, uniting them against a common enemy, but costing three million lives and facing the wrath of Rorschach and Doctor Manhattan. 

9. Otto Octavius (Marvel Comics)

Dr. Otto Octavius is a highly intelligent and prideful scientist, better known as the criminal mastermind Doctor Octopus. During an atomic research project, Octavius’ body was fused to four mechanical, tentacle-like arms, also causing him severe brain damage that turned him into a criminal. 

8. Othello (Othello)

A Christian Moor and general of the armies of Venice, Othello is an eloquent and physically powerful figure, respected by all those around him, and is the play’s protagonist and hero.

7. Oliver Twist (Oliver Twist)

Oliver Twist begins in a workhouse in 1830s England, in an unnamed village, where a young woman, revealed to be Oliver’s mother, gives birth to her son and promptly dies. The boy, lucky to survive, is raised until the age of nine on a “farm” for young orphaned children, and then is sent to the local workhouse again, where he labors for a time until his innocent request for more food so angers the house’s board and beadle, Mr. Bumble, that the workhouse attempts to foist Oliver off as an apprentice to some worker in the villager.

6. Omar Little (The Wire)

Omar Devon Little was a stickup man in West Baltimore who robbed both the Barksdale and Stanfield organizations. Omar was a colorful character, notable for his 12-gauge shotgun, trench coat, openly gay lifestyle, facial scar, refusal to swear, and foreboding whistle of “The Farmer in the Dell”. 

5. Orihime Inoue (Bleach)

Orihime Inoue is a Human living in Karakura Town. She is a former student of Karakura High School and is now married to Ichigo Kurosaki and has a son named Kazui Kurosaki. 

4. Odin Borson (Marvel Comics)

Odin Borson, also known as the All-Father, is the King of Asgard, the land of the Norse gods of myth. As a supreme warrior and slayer of the ice giants, he is a force to behold and he raised a son named Thor with whom he defends their godly realm against threats planetary, cosmic, and sometimes even familial.

3. Obito Uchiha (Naruto Shippuden)

Obito Uchiha was a member of Konohagakure‘s Uchiha clan. He was believed to have died during the Third Shinobi World War, his only surviving legacy being the Sharingan he gave to his teammate, Kakashi Hatake, but in truth, Obito was saved from death and trained by Madara, but the events of the war left Obito disillusioned with reality, and he inherited Madara’s plan to create an ideal world. 

2. Optimus Prime (Transformers)

Optimus Prime is the main protagonist of the Transformers film series and the leader of the Autobots, the last Prime, and the brother of the Decepticon leader Megatron. Optimus was mentored by Sentinel Prime, the last Prime before him, and eventually became the leader of the Cybertronian scientific division, while Megatron became Lord High Protector of Cybertron. 

1. Obi-Wan Kenobi (Star Wars)

Obi-Wan Kenobi was a legendary Force-sensitive human male Jedi Master who served on the Jedi High Council during the final years of the Republic Era. As a Jedi General, Kenobi served in the Grand Army of the Republic that fought against the Separatist Droid Army during the Clone Wars.