He is an animatronic orange weasel & a mascot of Willy's Wonderland. Seemingly a friendly animatronic, Willy is possessed by the soul of Jerry Willis, the original owner of the restaurant & a notorious serial killer who formed a team of Satanists & other serial killers to help him murder unsuspecting families at the establishment. To avoid being arrested, he & his team performed a Satanic suicide ritual to transfer their souls into the animatronics, possessing them & killing & eating everyone.