This design is a bunny from Terraria Here's some trivia on the little critter: -The Bunny is an iconic Terraria element and can be seen on many of Terraria's logos. -One of the world generating/loading statements on console and mobile editions is: 'Killing bunnies is cruel. Period.' -Humorously, a bunny wearing a slime costume is labeled as "slime" when moused over. -In Halloween, There is also a slime wearing a Bunny costume -when a blood moon occurs bunnies turn into corrupt or crimtane bunnies Most of this information was found on http://terraria.gamepedia.com/Bunny (if down vote plz tell me why!)