if you dont know: Dusk is an exe who haunts Tails' dreams, in turn making Tails fear falling asleep, as Tails is kind of traumatized by what Dusk has done. random stuff: Dusk's reason for having one eye is just cuz i like it, the design choice is kinda based on cyclops.ISO. Dusk is made of an inky like substance (i have to draw each line on his body for each piece of art i do for him). The reason he has Sonic as a body, is because he saw how Tails saw sonic like a brother, and decided "being Sonic" would make tormenting Tails alot easier. He has no idea of his powers, and torments tails to watch him suffer.
