A mysterious and isolated girl in Yomiyama North Middle School's third year's third class. Her left eye is covered by an eye patch. The girl with a mysterious presence and who is always sketching alone. She is labelled as the one that "does not exist."

Sylphiette is Rudeus' childhood friend who is part human, elf, and beast race. In her youth, she had short green hair and elfish ears. Her tomboyish appearance initially made Rudeus believe she was a boy. (Source: Mushoku Tensei Wiki)