Blue Exorcist follows the story of Rin Okumura, a teenager who discovers that he is the son of Satan and possesses blue flames. This anime is filled with action, comedy, and supernatural elements that will keep you on the edge of your seat. Rin's blue hair not only adds to his rebellious nature but also represents his unique powers as a half-demon.1. Blue Exorcist
Chobits is a science fiction romance anime about a young man named Hideki who finds a discarded persocom (humanoid computer) and names her Chi. Chi's blue hair and innocent personality make her stand out in a world filled with technology and machines. As Hideki and Chi's relationship develops, the mystery of Chi's origins and purpose unravels.2. Chobits
Darling in the Franxx is a mecha anime set in a post-apocalyptic world where children are raised to pilot robots called Franxx to protect humanity. The main female protagonist, Zero Two, has striking long blue hair and is known as the "Partner Killer" due to her past. Her hair color also hints at her non-human origins, adding to the mystery surrounding her character.3. Darling in the Franxx
Guilty Crown takes place in a dystopian future where a virus called the Apocalypse Virus has ravaged Japan. The main character, Shu Ouma, has the ability to extract weapons from people's hearts, and when he does so, his hair turns blue. The blue hair symbolizes his newfound power and the burden he carries as the "King" who must save his country.4. Guilty Crown
Kiznaiver is a sci-fi drama about a group of teenagers who are connected through a system called the "Kizuna System," which allows them to share their pain and emotions. The main character, Katsuhira Agata, has pale blue hair, which sets him apart from the other characters and reflects his emotionally numb personality. As the series progresses, his hair color changes to a brighter blue, indicating his character development.5. Kiznaiver
No Game No Life follows the story of two siblings, Sora and Shiro, who are transported to a world where everything is decided by games. Sora's hair is a vibrant blue, representing his intelligence and strategic thinking, while his sister's hair is pale blue, symbolizing her calm and calculating nature. Together, they use their gaming skills to conquer the world and become known as the "undefeated gamers."6. No Game No Life
Plastic Memories is a sci-fi romance anime set in a world where androids called "Giftias" are created to assist humans. The main character, Tsukasa Mizugaki, has a job of retrieving expired Giftias, and he meets a unique one named Isla, who has beautiful blue hair. Her hair color not only adds to her charming appearance but also hints at her emotional complexity as a Giftia.7. Plastic Memories
Re:Zero follows the story of Subaru Natsuki, who is transported to a fantasy world and discovers he has the ability to reverse time after dying. Emilia, one of the main female protagonists, has long blue hair that symbolizes her royal status and ice magic abilities. As Subaru goes through numerous time loops, Emilia's hair color remains a constant reminder of his journey and her importance in it.8. Re:Zero
Sword Art Online is a popular isekai anime about players who get trapped inside a virtual reality game. The main female protagonist, Asuna Yuuki, is a skilled swordswoman with beautiful blue hair that represents her strength and determination. Asuna's hair color also changes throughout the series, reflecting her character development and relationships.9. Sword Art Online
Violet Evergarden is a drama anime about a former child soldier who becomes an "Auto Memory Doll," a ghostwriter who helps people express their emotions through letters. Violet's hair is a striking shade of blue, which not only stands out among the other characters but also symbolizes her cold and emotionless nature. As she learns the true meaning of emotions, her hair gradually becomes a lighter shade of blue, representing her growth and understanding of human feelings.10. Violet Evergarden