Butterfly cartoon is the protagonist of that work.

Butterfly is a character in the comic book "The Witch's Little Circle". Butterfly in the Four Sides is a role created by the animation company SHAFT in the first season of The Witch Little Circle. In the small circle of magical girls, Butterfly Square is a magical girl who fights with other magical girls to defend the world from evil forces. Her role has special significance. She is one of the most powerful opponents of Xiao Yuan and other magical girls, and also one of the most important and striking villains in the plot. Her storyline and character design have attracted many fans, and also made "The Little Circle of Magical Girls" a popular cartoon.