While Matt Furie's "The Night Riders" features a cast of characters led by Hoppy, Ratty, Draggy, and Flappy, a more elusive creature named GREMLY hides on most pages. This mystery adds intrigue to the story. GREMLY's sporadic appearances could be due to shyness, clever disguises, or hold narrative significance. Readers can have fun searching for GREMLY, sparking imagination about their role and purpose in this whimsical world.