Eryn is a fairy with a human form that dwells in Fang's Fury, who suffers from amnesia. She thinks Fang is stupid and she looks down on him with annoyance. However, aside from her dislike of Fang's laziness and interest solely in food, she is very similar to him in terms of personality. She can hold her breath for a long period of time. Her hobby is sitz bathing, she likes sweets, dislikes ghosts.