Character: shyren
Shyren (/ˈʃaɪ.ɹən/) is an enemy that appears in Waterfall.
Shyren is a fish-like monster, ashamed of her scary face and poor singing. She fights with her back turned to the protagonist. Her "body" is a separate entity from her while her "head" is her entire body.
This tag implicates undertale (learn more).