Anime Characters that Start with O: Iconic Names

O for Olivier Mira Armstrong, O for Orochimaru, O for Orihime Inoue. In this article, you will find the most iconic anime characters whose names start with O.

41. Ox Ford (Soul Eater)

Ox Ford is a meister at Death Weapon Meister Academy, the weapon partner of Harvar D. Éclair, and is both a contender for being top of the class and considered one of the best students within the E.A.T Class. As one of the students with the highest grades, Ox is a very studious and serious person, as both he and Harvar seemingly constantly study.

40. Ōko Yushima (Bleach)

Ōko Yushima is a Shinigami of the 12th Division who worked in the Shinigami Research and Development Institute and was the developer of the Mod-Souls. Yushima comes across as shy around others but despite this shyness, Yushima cared little about being with others, believing that if he relies on others they will only get in the way

39. Onyango (Fire Force)

Onyango is a former Third Generation Lieutenant of Special Fire Force Company 1, who returned from retirement after Rekka Hoshimiya’s death. Despite being forced out of retirement, Onyango is perfectly willing to embrace his old role, even ready to take part in a photo shoot for the Firefighter’s Calendar.

38. Otoko (One Piece)

Otoko is a girl who lived in the Flower Capital of Wano Country and worked as a kamuro for the courtesan Komurasaki until she angered the shogun Kurozumi Orochi. She is the adopted daughter of the late former daimyo of Hakumai Shimotsuki Yasuie and a member of the Shimotsuki clan.

37. Otama (One Piece)

Otama is a girl from the region of Kuri in Wano Country and a kasa weaver working under Tenguyama Hitetsu, as well as a kunoichi in training under the apprenticeship of Shinobu. Otama befriended Portgas D. Ace four years ago, having wished to join his crew at the time.

36. Outlook The Third (One Piece)

Outlook the Third is a noble living in the Goa Kingdom on Dawn Island and is the husband of Didit, Sabo’s biological father, and Sterry’s adoptive father. Like all nobles shown from the Goa Kingdom, Outlook is an arrogant person who does not care for anyone that is of lesser status than himself, referring to them as trash.

35. Odama (One Piece)

Odama is a firework-making expert and Kodama’s grandfather who lives on Fireworks Island. Odama constantly wears a frown on his face, which reflects his stoic, abrasive personality; he comes off as dismissive and rude to strangers, and he has a very matter-of-fact attitude toward his line of work. 

34. Oars (One Piece)

Oars the Continent-Puller was an infamous ancient giant who was born over 500 years prior to the current storyline. After he died, his body was unearthed by the Thriller Bark Pirates and used to create the 900th Zombie of Gecko Moria’s zombie army.

33. Osiris (JoJo’s Bizarre Adventure)

Osiris is the Stand of Daniel J. D’Arby, featured in Stardust Crusaders. Osiris is an Automatic Stand that complements Daniel J. D’Arby’s gambling and cheating skills; more precisely, it is the cooperation between Daniel’s gambling and Osiris’ ability to steal souls in easy-to-reach conditions that make the pair so dangerous.

32. Oingo (JoJo’s Bizarre Adventure)

Oingo is a minor antagonist appearing in Stardust Crusaders, and as a part of the Egypt 9 Glory Gods, he attempts to assassinate the Joestar Group alongside his little brother Boingo. His Stand is Khnum, which allows him to disguise himself as anyone. 

31. Obra (Fairy Tail)

Obra is a former elite Mage of the Raven Tail Guild. Obra is a devious creature, sneakingly joining Raven Tail without its real appearance being noticed by the Mages, including its former Guild Master: Ivan Dreyar. 

30. Ooba Babasaama (Fairy Tail)

Ooba Babasaama is the Guild Master of Lamia Scale and has a rash and loud personality, furiously berating herself and her guild for not winning the Grand Magic Games as well as ordering them to work harder. She does, however, seem to have the guild’s best interests in heart, all she wants is to establish Lamia Scale as the strongest guild in Fiore, as do her guild’s Mages.

29. Orga Nanagear (Fairy Tail)

Orga Nanagear is a Lightning God Slayer and one of the five strongest Mages of Sabertooth, the former strongest Guild in Fiore, in terms of power. Orga is one of the quieter members of his team, rarely ever talking or changing his neutral facial expression, even when engaged in battle and when actually confronted with an opponent, his demeanor appears to suit this neutrality, with him callously striking down his foe.

28. Org (Fairy Tail)

Org was a member of the Magic Council, where he occupied the 2nd Seat. He used to despise the Fairy Tail Guild for the constant troubles they brought but eventually began viewing them in a much grander, softer light following their more notable achievements, such as destroying the Oración Seis.

27. Ox-King (Dragon Ball)

Ox-King, also referred to as Ox Demon King when his castle was engulfed in flames, is the king of Fire Mountain, as well as the father of Chi-Chi, the father-in-law of Goku, the grandfather of Gohan and Goten, and the great grandfather of Pan. He once trained with Goku’s adoptive grandfather, Grandpa Gohan, under Master Roshi at the Turtle School. 

26. Obni (Dragon Ball)

Obni is a warrior from Universe 10 and a member of Team Universe 10. Obni is respectful towards his opponents and wants to challenge even stronger fighters.

25. Oregano (Dragon Ball)

Oregano is a warrior from Universe 9 and a member of Team Universe 9. When his team was eliminated from the tournament and thus, decided for elimination from existence, he was shown to be really scared of his fate. 

24. Ogma (Dragon Ball)

Ogma is the Supreme Kai of Universe 5. A gentle god who values a balance of knowledge and power, Ogma is proud of her work, as she understands the sparing of her, her fellow gods, and her universe by Zeno and Future Zeno in recognition of their good work. 

23. Oceanus Shenron (Dragon Ball)

Oceanus Shenron is the Shadow Dragon of water and wind. Oceanus Shenron is very arrogant and cruel, attacking other creatures such as seagulls and innocent creatures for no apparent reason beyond sadism, perhaps not unlike the other Shadow Dragons. 

22. Orlen (Dragon Ball)

Orlen is one of Frieza’s soldiers on Namek who only appears in the anime. Orlen appears to be very ruthless, as he interrogates and kills a dying Namekian without showing any sympathy or remorse and despite having little to nothing to gain from killing him. 

21. Oolong (Dragon Ball)

Oolong is a protagonist in the Dragon Ball manga and its anime adaptation Dragon Ball, making minor appearances in Dragon Ball Z and Dragon Ball GT as well. He is an anthropomorphic, shapeshifting pig who met Bulma and Goku while on their quest to find the Dragon Balls, and after their adventure, he begins living at Capsule Corporation in West City.

20. Olibu (Dragon Ball)

Olibu is a deceased Human-type Earthling fighter and hero from the North Area in the universe and King Kai’s greatest fighter next to Goku. King Kai stated that most of Earth’s heroic legends are based on Olibu’s acts of heroism during his life and it is implied in an anime filler that Korin Tower on Earth could have been built to honor him. 

19. Okisuke (Naruto: Shippuden)

Okisuke is a samurai from the Land of Iron and one of Mifune’s right-hand men alongside Urakaku. Okisuke is a very solemn, and dutiful individual who will carry out his assigned tasks to the letter without hesitation, and in the anime, he voiced distaste in teaming up with shinobi, believing that they were using the samurai as mere tools for the safety of the whole world. 

18. Ōnoki (Naruto: Shippuden)

Ōnoki, renowned as “Ōnoki of Both Scales”, was the Third Tsuchikage of Iwagakure. Ōnoki was a very proud, headstrong, and boastful individual who refused to retire and choose a successor as Tsuchikage despite being up in age, insisting that he was still strong enough to continue to rule the village.

17. Omoi (Naruto: Shippuden)

Omoi is a shinobi from Kumogakure that serves as a close aid for the Fifth Raikage and a very cautious person who likes to think things through before acting, and as a result, gets lost in his thoughts quite often. He is more level-headed than his teammate Karui, but often demonstrates a wild imagination and has a habit of exaggerating the end result of minor things (like when Karui threw a rock at him and he believed it would cause an avalanche and destroy Konohagakure) and likes to make fun of Karui’s hot-headed personality with painful results.

16. Oboro (Naruto)

Oboro is a genin from Amegakure. He is described as vindictive, and impatient and this was shown when he showed joy at the opportunity to exact revenge against Sasuke for their previous fight. 

15. Otonashi Yuzuru (Angel Beats)

Otonashi Yuzuru is the main protagonist of Angel Beats!, coming in as one of the newest members of the SSS, and a newcomer to the Afterlife. After suffering from an accident during his lifetime, he wakes up in the Afterlife without his memories. 

14. Ortho Brother (HunterxHunter)

Ortho Brother was the male member of the Ortho Siblings, a pair of Chimera Ant siblings who resided in an Underground Lake in the Republic of East Gorteau. Ortho brother was quite sadistic, wondering why Killua wasn’t screaming, and expressing that he wanted Killua to die in fear.

13. Ortho Sister (HunterxHunter)

Ortho Sister was the female member of the Ortho Siblings, a pair of Chimera Ant siblings who resided in an Underground Lake in the Republic of East Gorteau. Ortho Sister was very trusting of her brother and was proud of his abilities. 

12. Omokage (HunterxHunter)

Omokage was the first member #4 of the Phantom Troupe, who was later replaced by Hisoka. He had a superiority complex, as he called other people “humans”.

11. Ozaki (Demon Slayer: Kimetsu No Yaiba)

Ozaki was a minor supporting character in Demon Slayer: Kimetsu no Yaiba, a Demon Slayer and part of the Demon Slayer Corps. Not much is known about her personality, but it is seen that she was a very kind and selfless girl as she warned her fellow Demon Slayers to not approach her since she’d just end up unintentionally hurting them, begging them for help not just for her but for the other captured Slayers. 

10. Otose (Gintama)

Terada Ayano, also known by her genjina (professional name) as Otose, is the owner of the Otose Snack House. She holds the title of one of the 4 Devas of Kabuki District kabuki chou shitennou and runs Otose’s Snack House on the ground floor below the Yorozuya.

9. Ogun Montgomery (Fire Force)

Ogun Montgomery is a former Third Generation and member of Special Fire Force Company 4. Ogun is committed to protecting everyone living in Tokyo; this is due to his family’s history and being defended by the hero who brought these immigrants to the empire to save them from the Great Cataclysm.

8. Oluo Bozado (Attack On Titan)

Oluo Bozado was a soldier of the Survey Corps hand-picked by Levi Ackerman to be included in the Special Operations Squad and was a skilled soldier with a very high Titan kill record. Oluo was a very self-confident, outspoken individual, and enjoyed boasting about his own prowess but despite his obnoxious demeanor, he was the best out of Levi’s Special Operations Squad; his 39 solo kills (highest solo kills out of his peers, bested only by Levi) fueled his haughty nature. 

7. Ōbi Okitaru (Fire Force)

Ōbi Akitaru is the former captain of Tokyo’s Special Fire Force Company 8. Ōbi is a courageous individual, able to face Infernals and ability-users with courage, and despite lacking an Ignition Ability and fearing death, he believes that he cannot afford to flinch or hesitate because of his responsibility to his teammates.

6. Obanai Iguro (Demon Slayer: Kimetsu No Yaiba)

Obanai Iguro is a major supporting character in Demon Slayer: Kimetsu no Yaiba, a Demon Slayer of the Demon Slayer Corps and the current Serpent Hashira. Obanai is a very harsh and strict individual who shows no concern for those who do not abide by the Demon Slayer rules, and his expectations for his fellow Demon Slayers are nigh-unrealistic, berating Tengen Uzui for suffering heavy wounds against the “weakest” Upper Rank and telling him to “fight to the death” when Tengen insists on retiring.

5. 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. 

4. 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. 

3. Oden Kozuki (One Piece)

Oden Kozuki was the daimyo of Kuri in Wano Country and the son of the former shogun Kozuki Sukiyaki, being a member of the Kozuki Family. He was the husband of Kozuki Toki and the father of Momonosuke and Hiyori; additionally, he was the leader of a group of legendary and powerful samurai known as the Nine Red Scabbards and served as the 2nd division commander of the Whitebeard Pirates, and later became a member of the Roger Pirates.

2. Orihime Inoue (Bleach)

Orihime Inoue is a Human living in Karakura Town, a former student of Karakura High School, and currently married to Ichigo Kurosaki and has a son named Kazui Kurosaki. Like many other friends of Ichigo, she quickly develops spiritual powers of her own after Ichigo becomes a Soul Reaper.

1. 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.