Anime characters that start with O

77+ Outstanding Anime Characters that Start with Letter O

Welcome back, anime lovers! Today we have a special treat for you – a list of 25 anime character names that start with the letter O. These characters are sure to catch your attention with their unique personalities, skills and stories. So without further ado, let’s dive into this exciting list!

1. Ochaco Uraraka ( My Hero Academia )

First on our list is the lovable and determined heroine from My Hero Academia, Ochaco Uraraka. Her quirk, Zero Gravity, allows her to manipulate gravity at will and makes her a formidable opponent in battles. But beyond her powers, it’s her kind heart and unwavering determination that makes her a fan favorite.

Anime characters that start with O

2. Obito Uchiha ( Naruto )

Next up is the tragic and complex character from the popular anime series, Naruto. Obito Uchiha starts off as a loyal friend to Kakashi and a member of Team Minato. But after experiencing immense loss and betrayal, he becomes the notorious villain known as Tobi or Madara Uchiha. His journey is one of the most intriguing in the series.

3. Okabe Rintarou ( Steins;Gate )

Moving on to a more light-hearted character, we have Okabe Rintarou from Steins;Gate. This eccentric and self-proclaimed mad scientist takes us on an exciting time-travel adventure with his friends. Despite his eccentricity, he is a deeply caring friend and shows great determination in changing the course of events.

4. Oumae Kumiko ( Sound! Euphonium )

Oumae Kumiko from Sound! Euphonium is another fan favorite character known for her strong will and dedication towards music. She is part of the brass band club and strives to become better every day. Her growth as a character, both in music and personal relationships, is a joy to watch.

5. Onodera Kosaki ( Nisekoi )

Next, we have the sweet and shy heroine from Nisekoi, Onodera Kosaki. She is the childhood friend of the main protagonist Raku and harbors a secret crush on him. Despite her timid nature, she shows great courage when it comes to protecting her friends and loved ones.

6. Oga Tatsumi ( Beelzebub )

Oga Tatsumi from Beelzebub is not your typical high school delinquent. When he accidentally becomes the adoptive father of the future demon king, his life takes a chaotic turn. But with his incredible strength and unwavering loyalty towards his friends, Oga becomes a force to be reckoned with.

7. Orihara Izaya ( Durarara!! )

Moving on to one of the most cunning and manipulative characters in anime, we have Orihara Izaya from Durarara!!. He enjoys stirring up trouble and causing chaos in the lives of others, but he also has a complex past and motivations that make him a fascinating character to follow.

8. Osaka ( Azumanga Daioh )

Osaka from Azumanga Daioh is known for her airheadedness and random musings. She has a unique way of looking at the world and often brings comedic relief to the series. Despite her absent-mindedness, she shows great insight and intelligence when it comes to her friends’ problems.

9. Oga Kafuka ( Sayonara, Zetsubou-Sensei )

Oga Kafuka is another eccentric character on our list from Sayonara, Zetsubou-Sensei. She is known for her cheerful and optimistic personality, but there’s often more to her than meets the eye. Her interactions with the other quirky characters in the series are always entertaining.

10. Ootori Kyouya ( Ouran High School Host Club )

Next up, we have the cool and collected vice president of the Ouran Host Club, Ootori Kyouya. He is often seen as the brains behind the club’s operations and always has a plan up his sleeve. But beyond his business-like demeanor, he also shows a caring side towards his friends.

11. Okita Sougo ( Gintama )

From one cool character to another, we have Okita Sougo from Gintama. He is a skilled swordsman and member of the Shinsengumi police force. Despite his cold and sarcastic personality, he has a soft spot for his sister and often shows a more caring side when it comes to her.

12. Otonashi Yuzuru ( Angel Beats! )

Otonashi Yuzuru from Angel Beats! starts off as an amnesiac with no recollection of his past or how he ended up in the afterlife. But as he joins forces with a group of rebels fighting against the “angel” in charge, he slowly uncovers the truth about himself and his purpose.

13. Orihime Inoue ( Bleach )

Next, we have the kind-hearted and compassionate Orihime Inoue from Bleach. She possesses healing abilities and often puts others’ well-being before her own. Her journey to become a stronger fighter is admirable, and she provides great emotional support to the main protagonist, Ichigo.

14. Ohara Mari ( Love Live! Sunshine!! )

Ohara Mari from Love Live! Sunshine!! is the energetic and confident leader of the school idol group, Aqours. Her love for music and her determination to save her beloved school make her an inspiring character. She also has a playful side that adds humor to the series.

15. Oomuro Sakurako ( Yuru Yuri )

Oomuro Sakurako from Yuru Yuri is another cheerful and bubbly character on our list. She is part of the Amusement Club and enjoys teasing her friends. But she also has a caring side and will do anything for her friends, making her a lovable character to follow.

16. Oumae Michiru ( Hibike! Euphonium )

Next, we have Oumae Michiru from Hibike! Euphonium, a talented euphonium player who initially gives up music due to her lack of confidence. But with the help of her friends and mentors, she regains her passion for music and becomes an integral part of the school band.

17. Oikawa Tooru ( Haikyuu!! )

Oikawa Tooru from Haikyuu!! is the charming and talented setter of Aoba Johsai High’s volleyball team. He has a competitive spirit and often butts heads with the main protagonist, Hinata. But beyond his cockiness lies a hardworking player who never gives up on his team.

18. Otohime Ryuuguu ( Seto no Hanayome )

Otohime Ryuuguu from Seto no Hanayome is a mermaid princess who is forced to marry the main protagonist, Nagasumi. Despite coming from different worlds and initially despising each other, they eventually fall in love. Her quirky personality and comedic interactions with Nagasumi make her a lovable character.

19. Owari Asuka ( Hibike! Euphonium )

Another talented musician from Hibike! Euphonium, Owari Asuka is the eccentric and charismatic president of the school band. She has a strong passion for music and pushes her fellow members to be their best. Her dynamic personality makes her a standout character in the series.

20. Ozaki Toshio ( Shiki )

From the horror anime Shiki, we have Ozaki Toshio, a doctor who becomes suspicious of the sudden deaths occurring in his small town. He is determined to uncover the truth behind these mysterious deaths and protect his loved ones from the supernatural threat. His bravery and intelligence make him a compelling character to follow.

21. Oshino Meme ( Bakemonogatari )

Oshino Meme from Bakemonogatari is a mysterious and knowledgeable character who helps the main protagonist, Araragi, deal with supernatural occurrences. He often provides witty advice and has a laid-back personality that adds humor to the series.

22. Otonashi Saya ( Blood+ )

Otonashi Saya from Blood+ is a kind and caring character who fights against creatures called chiropterans to protect her friends and loved ones. She also struggles with her identity and memories, making her story both action-packed and emotionally charged.

23. Okazaki Ushio ( Clannad )

Okazaki Ushio from Clannad is a young girl who initially has a strained relationship with her father, Tomoya. But as they go through various challenges and bond over their love for each other, their relationship becomes the heart of the series. Her innocent and pure personality makes her a beloved character.

24. Okabe Rintarou ( Steins;Gate )

Next, we have the eccentric and self-proclaimed mad scientist, Okabe Rintarou from Steins;Gate. His journey through time travel and alternate timelines is a rollercoaster of emotions, but his determination to save his friends from a tragic fate makes him an unforgettable character.

25. Oga Tatsumi ( Beelzebub )

Finally, we have the delinquent and reluctant “father” of the demon baby, Beelzebub. Oga Tatsumi initially sees his new role as a burden, but as he bonds with Beelzebub and his friends, he becomes a caring and protective figure in their lives. His growth as a character is heartwarming to witness.


Keep exploring the world of anime and discover new characters with names starting with “O” that capture your attention and leave a lasting impression. There are many more unique and interesting characters out there waiting to be discovered!

Few Notable Anime characters with Letter O:

  • Otani Atsushi (Lovely Complex)
  • Okita Sougo (Gintama)
  • Orihara Izaya (Durarara!!)
  • Onodera Kosaki (Nisekoi)
  • Otonashi Kyouko (Maison Ikkoku)
  • Okumura Rin (Blue Exorcist)
  • Oshino Shinobu (Bakemonogatari)
  • Oshino Ougi (Monogatari series)
  • Okabe Kurisu (Steins;Gate)
  • Oshiroi Hana (Ben-To)
  • Otonashi Yuzuru (Angel Beats!)
  • Ookami Ryouko (Ookami-san to Shichinin no Nakama-tachi)
  • Ookurikara (Touken Ranbu: Hanamaru)
  • Oota Shinichi (Tanaka-kun wa Itsumo Kedaruge)
  • Oda Yae (Sengoku Night Blood)
  • Ozu Toshio (The Tatami Galaxy)
  • Ouji Momo (Looking Up At The Half-Moon)
  • Ogasawara Haruka (Sound! Euphonium)
  • Okamoto Nobuhiko (voice actor, known for roles in My Hero Academia and Haikyuu!!)
  • Osamu Dazai (Bungou Stray Dogs)
  • Ohana Matsumae (Hanasaku Iroha)
  • Oda Nobunaga (Fate/Grand Order)
  • Oshino Gyoukou (Monogatari series)
  • Ookurikara (Touken Ranbu: Hanamaru)
  • Oosaki Nako (Hanasaku Iroha)
  • Obi (Akagami no Shirayuki-hime)
  • Okakura Tada (Kino no Tabi: The Beautiful World)
  • Oosaki Chihiro (Shoujo Shuumatsu Ryokou)
  • Oda Cinnamon Nobunaga (Oda Shinamon Nobunaga)
  • Oribe Yasuaki (Hiiro no Kakera)
  • Okumura Miki (Gakuen Babysitters)
  • Otomo Ryuugo (Saiyuuki Reload Blast)
  • Ougi Takaya (Ayakashi: Japanese Classic Horror)

Final Words:

Anime has an endless amount of characters with names starting with “O”, each with their own unique stories and personalities. So keep exploring and discovering new favorites, and never stop falling in love with the amazing world of anime!

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