In the second chapter of Naruto New Era, the class leader was the daughter of Naruto Uzumaki.
Seamless Blue Ice was Shen Xiao's adopted daughter.
The drumstick girl was the daughter of Prime Minister Lin Ruofu and Eldest Princess Li Yunrui. Her name was Lin Wan 'er.
The cartoon might showcase the contrast in their personalities. Maybe the pink-haired girl is more lively and the blue-haired one is calmer.
A manga girl with blue hair often attracts attention because it's a non-traditional hair color. It can imply that she's not ordinary, perhaps having some extraordinary abilities or a distinct role in the story. The color choice itself can enhance her visual impact and make her more visually appealing to readers.
It could be just a creative choice by the artist to make the girl stand out or give her a unique look.
Often, a girl with blue hair in cartoons might represent fantasy or a departure from the ordinary. It could imply that she has a magical or otherworldly quality. Also, the color choice could be for visual appeal to catch the viewers' attention.
A blue hair cartoon girl might be known for her unique and eye-catching appearance. Maybe she has a charming personality and stands out among other characters.
The long faced blue hair girl might be depicted as calm and mysterious. The orange hair girl could be energetic and outgoing.