This is one of the characters in Chapter 2's Grillby scene. They're a monster that appears to only have a mouth. They're pretty upfront about wanting to eat the human though. I think their voice should be based on Audrey 2 from Little Shop of Horrors, the little screentime they have gives off that vibe. 

Due to this being such a small role, it is not paying. It is simply for people who want to be a part of this project.