Ouran High School Host Club is a classic in the harem anime genre, with its charming and lovable characters and hilarious antics. The main protagonist, Tamaki Suoh, sports a striking blue hair that makes him stand out in a sea of typical black-haired anime boys. His dashing looks and charismatic personality make him a hit with the ladies, earning him a spot in our list of top 10 harem anime blue hair boys.Ouran High School Host Club
Fruits Basket may not be your typical harem anime, but it definitely has some elements of it. The story revolves around Tohru Honda, a kind-hearted girl who comes into contact with the Sohma family, who are cursed to transform into zodiac animals. Among the many colorful characters in the series is Kyo Sohma, the cat of the zodiac. With his bright blue hair and fiery personality, Kyo becomes a fan favorite among viewers and adds a touch of harem to the mix.Fruits Basket
The World God Only Knows is a unique harem anime that combines elements of romance, comedy, and gaming. The main character, Keima Katsuragi, is a master at dating sim games but is not interested in real-life relationships. However, he gets roped into helping a demon named Elsie capture runaway spirits by using his dating skills. One of the girls he encounters is Ayumi Takahara, a popular and energetic girl with stunning blue hair that adds to her charm.The World God Only Knows
In Trinity Seven, the main character Arata Kasuga finds himself in a school of magic after his hometown is destroyed. He is surrounded by seven powerful and beautiful girls, known as the Trinity Seven, who possess unique magical abilities. Among them is Levi Kazama, a strong and confident girl with striking blue hair. Her no-nonsense attitude and impressive fighting skills make her a force to be reckoned with in the harem.Trinity Seven
High School DxD is a popular ecchi harem anime that follows the story of Issei Hyoudou, a perverted high school student who gets killed on his first date and is revived by a devil named Rias Gremory. As a devil, Issei gains powers and finds himself in the middle of a battle between devils, angels, and fallen angels. Among the many beautiful girls in the series is Akeno Himejima, a seductive and powerful fallen angel with mesmerizing blue hair.High School DxD
Date A Live is a harem anime with a sci-fi twist, where the protagonist Shido Itsuka has to date and seal the powers of powerful girls known as Spirits to prevent them from causing destruction. One of the first Spirits he encounters is Tohka Yatogami, a sweet and innocent girl with long, pale blue hair. Her gentle nature and adorable appearance make her a fan favorite in the series.Date A Live
In The Testament of Sister New Devil, Basara Tojo finds out that his father has remarried and now has two new step-sisters, Mio and Maria. However, he soon discovers that his new sisters are actually demons and he is the descendant of a powerful demon clan. Among the many girls in the series is Yuki Nonaka, a shy and reserved girl with stunning blue hair. Despite her quiet nature, Yuki proves to be a valuable member of Basara's harem.The Testament of Sister New Devil
Infinite Stratos is a mecha harem anime where the world is dominated by powerful machines known as Infinite Stratos, which can only be operated by women. However, Ichika Orimura, the only male who can operate an Infinite Stratos, is enrolled in an all-girls academy and becomes the center of attention for the female students. Among them is Houki Shinonono, a determined and skilled pilot with striking blue hair and a tsundere personality.Infinite Stratos
The Quintessential Quintuplets follows the story of Futaro Uesugi, a high school student hired to tutor the quintuplet daughters of a wealthy family. Among the five sisters is Itsuki Nakano, the youngest and most rebellious sister with bright blue hair. Despite their initial dislike for each other, Futaro and Itsuki develop a close bond, making her an essential member of his harem.The Quintessential Quintuplets
Love, Chunibyo & Other Delusions is a heartwarming harem anime that tells the story of Yuuta Togashi, a former "chunibyo" or someone who believes they have special powers. He meets Rikka Takanashi, a girl who is still in her "chunibyo" phase, and they form a close bond. One of the supporting characters in the series is Shinka Nibutani, a popular and well-mannered girl with stunning blue hair. Her confident and mature personality makes her a refreshing addition to the harem.Love, Chunibyo & Other Delusions