Sol is is the daughter of teacher Miss Circle. She study at the Paper School from the Fundamental Paper Education series. She is really kind and nice. But she can kill just like mother if she gets angry or frustrated. She likes to draw and paint, she is also a paper demon.

Sol is as beautiful as her mother, she has spiky long hair with black demon horns that is similar to cat's ears. A striking part of her appearance is the absence of her neck and there's an ink stain on her right cheek