Sonny is a rather adorable looking sheep boy. He doesn't have the full looks of a ram, as clearly evidenced by the tiny little nub-horns on his forehead. What he does have is fluffy looking white wool, blue eyes, and what appears to be a disposition to being shirtless. Because of his lack of a shirt, you can see that Sonny does exercise, as he has well defined muscles, but not so much that he looks like a bodybuilder. His pants are a rather simple pair of denim jeans that are worn in some places and his shoes are a worn pair of sneakers. All in all, you pretty much think he looks like a twink, though he sure doesn't act like it.
Sonny is first encountered via the Sheep Shaving event by going from the Mall West Wing to the Mall Lockerroom. If the player consents to going all the way with shaving him and then groping him the first time and then sucking him off the second time around they are able to invite him to the bunker.
After taking the sheep's virginity, he reminisces about his home and would end up starting a quest for the player to bring the taste of home to the ram. However, it is not implemented yet.