Grillby is a being of pure fire. Unfortunately in Horrortale the magic is depleting and as a result his flames are burning him alive leaving him in a constant state of agony. He's a normally silent guy but he has a couple lines in the comic, (the majority of them are in the audition dialogue.)

Grillby's voice should be mid-range or deep and sound weak. 

This isn't a paid role because it's so small.