فیوییومی یاناگی

The human high-school-aged girl who becomes lost in the Demon World through unknown methods and becomes a ghost after being eaten by a carnivorous plant. The triangle headband that she always "wears" is a symbol of this.

Fuyumi is (or was) a human girl from Japan, and because of this Staz became even more interested in her; he often asks her about anime and manga from the human world. She wishes to be resurrected as a human, and to help Staz achieve that goal.

[Spoiler: It is later revealed that she became the sister of Hydra Bell, and the "daughter" of Neyn after she learns what happened to her missing mother.]