Dr. Valentine Ruster is a Muppet doctor from the Sesame Street mini-series, Super Healthy Monsters. He teaches his Muppet friends about doing things to keep the heart healthy, such as exercising and eating fruits and vegetables. He also hosts health-themed game shows. A few of his segments were featured on the 2013 DVD, C is for Cooking.
His name is a play on Dr. Valentin Fuster, heart surgeon and founder of the International SHE Foundation. Dr. Ruster is made from the orange live-hand Anything Muppet pattern.