Frank, also known as The Cheer-Upper, is a child who didn't know what his super power was. With the help of Stripe Man (Steve), Super Blue (Blue) and the Incredibly Helpful Friend (The Viewer), he found out that his super power is making people happy. He wears glasses and has stubs for hair. He is one of the only humans in Blue's Clues that is not live-action.
Frank has light purple skin. He has many stubs for hair and black glasses. He used to wear a blue shirt with brown pants, but now he wears a red superhero outfit including a hat, pants, shoes, and a shirt.
Frank only appeared in one episode, "Superfriends".