Uncle Grandpa has a large lumpy-staircase-shaped head, a red horseshoe mustache, pink nose, a red fanny pack that talks, a propeller hat, and an outfit consisting of a white shirt, lederhosen with rainbow suspenders, knee high tube socks, and black shoes. His outward appearance is very childlike and simplistic, and he is well-meaning, fun-loving, supporting, somewhat wise and surprisingly competent. In "Uncle Grandpa Sitter" he reveals that one of his abilities is to create a duplicate of himself, which he does in many episodes. His catchphrase is "Good morning!"
Allies and enemies[]
Friends: Bender, Skipper, Starfire, Jimmy, Jorgen, Finn, Marceline, Axel, Phineas, Isabella, Twilight Sparkle, Discord, Rick Sanchez, Amanda Payne, Steven, Connie, The Crystal Gems, Antauri, Star, Marco, Ford Pines, Mallow Pizza Steve, Mr.Gus, Lincoln Loud, The Loud Family
Enemies: Eobard Thawne, Deahtstroke, The Joker, Toffee, The Legion of Past, Present and Future Evil