Sailor Mercury is the first member to join the Sailor Senshi in the popular anime series Sailor Moon. With her signature blue hair and intelligence, she quickly became a fan favorite. Ami Mizuno, her civilian identity, is known for her studious nature and ability to analyze situations before jumping into action. As Sailor Mercury, she uses her powers of water and ice to defeat enemies and protect her friends.1. "Sailor Mercury" from Sailor Moon
Next on our list is the fierce and determined Mikasa Ackerman from Attack on Titan. Her striking blue hair is a contrast to her serious and stoic personality. As the adopted sister of the main character, Eren Yeager, Mikasa is a skilled fighter with exceptional strength and agility. Her loyalty and protectiveness towards Eren make her a valuable member of the Survey Corps as they fight against the Titans.2. "Mikasa Ackerman" from Attack on Titan
In the magical world of Fairy Tail, Lucy Heartfilia stands out with her long blue hair and celestial magic. As a member of the Fairy Tail guild, she goes on adventures with her friends and uses her celestial spirits to fight alongside her. Lucy's determination and kindness make her a beloved character, and her hair is often admired by other characters in the series.3. "Lucy Heartfilia" from Fairy Tail
The talented bassist of the light music club in K-On!, Mio Akiyama is known for her shy and reserved personality. Her signature blue hair is often tied up in two ponytails, giving her a cute and innocent appearance. Mio's love for music and her friends is evident in her passionate performances on stage, making her a beloved character in the anime community.4. "Mio Akiyama" from K-On!
As a Soul Reaper in the anime Bleach, Rukia Kuchiki has a unique appearance with her short blue hair and traditional Soul Reaper attire. Despite her petite stature, Rukia is a skilled fighter and possesses powerful ice-based abilities. Her friendship with the main character, Ichigo Kurosaki, is a central part of the series and has endeared her to fans around the world.5. "Rukia Kuchiki" from Bleach
The kind-hearted and determined Hinata Hyuga from Naruto has become an iconic character in the anime world. Her long blue hair and signature white eyes are a result of her Byakugan abilities, which allow her to see chakra. Hinata's quiet nature is often overshadowed by her powerful skills as a ninja, and her unwavering love for the main character, Naruto Uzumaki, has captured the hearts of fans.6. "Hinata Hyuga" from Naruto
While not technically an anime character, Miku Hatsune from the Vocaloid franchise has become a popular blue-haired icon. As a virtual singer, Miku's appearance can vary, but her signature blue pigtails and futuristic style are instantly recognizable. Her songs have gained a massive following, and she has become a symbol of the fusion between technology and music.7. "Miku Hatsune" from Vocaloid
In the virtual world of Sword Art Online, Asuna Yuuki stands out with her long blue hair and fearless attitude. As a skilled swordsman and member of the Knights of the Blood Oath guild, Asuna quickly becomes a valuable ally to the main character, Kirito. Her strong will and determination make her a fan favorite and a symbol of strength in the series.8. "Asuna Yuuki" from Sword Art Online
As one of the twin maids in the popular anime Re:Zero, Rem has captured the hearts of fans with her soft blue hair and gentle personality. Despite her quiet demeanor, Rem is a skilled fighter and possesses powerful healing abilities. Her devotion to the main character, Subaru Natsuki, has made her a beloved character in the series.9. "Rem" from Re:Zero
Ending our list is the energetic and competitive Kagami Hiiragi from Lucky Star. With her short blue hair and sharp wit, Kagami is a standout character in the slice-of-life anime. As the older twin sister, she often butts heads with her younger sister, but their strong bond is evident in their amusing interactions. Kagami's love for her friends and passion for her interests make her a relatable and lovable character.10. "Kagami Hiiragi" from Lucky Star