Blue Haired Girls
This is a list of the top, best blue haired girls in anime. Blue is a popular color for kawaii waifus but these characters are more than just for show.
Yoshino is a shy but kind spirit from Date A Live with the codename Hermit. At first she is unable to express herself so she has a second personality, 'Yoshinon', a rabbit puppet which she uses to articulate. She is voiced by Iori Nomizu.
Shino "Sinon, Sinonon, Hecate" Asada
Shino is a sharpshooter first seen in Sword Art Online II as her in game character: a Cait Sith with blue hair, cat ears, and a tail. She is later seen sporting combat gear and a sniper rifle. She is a calm and cool character while still being daunting enough to seem difficult to approach. She is voiced by Miyuki Sawashiro.
Juvia is the water mage in Fairy Tail (quite literally). She is first seemingly emotionless but eventually develops a happy and obsessive demeanor. Her loyalty and care for her guild becomes one of the highest among members throughout the series. She is voiced by Mai Nakahara.