Uncle Grandpa is the main character of the series Uncle Grandpa. He is everyone in the world's uncle and grandpa. He goes around helping children who have usually never heard of him, so their parents have to fill them in on who Uncle Grandpa is, having fond memories of him from their youth. The children do not appreciate his help at first, but then realize the great adventures they have with him. He is voice by Peter Browngardt.
He is a short older adult who wears black overalls with rainbow shoulder straps, a white collar shirt and wears a blue propeller hat that sits on top of his head (which has a prominent lump). He also has a brown mustache, with a tooth sticking out of it, and a large chin. He also wears a talking red fanny pack, known as Belly Bag.
Uncle Grandpa is very cheery, and the majority of the time happy. He likes to help others, especially his friends and mainly helps kids around the world. Uncle Grandpa seems to have a different array of magical powers, that range from time travelling and making clones of himself. Uncle Grandpa is always using these magical powers, with the assistance of his Belly Bag of course. At first Uncle Grandpa's plans seem dumb, but in the end his plans usually work in his favor and he ends up getting the job done.