Keel is a bipedal gator standing at 12 feet on his hind legs, sporting white scales with a few gray dots, a cyan underbelly, cyan eyeshadow and spines, and two antennae on his head. He sports a rotund belly. He is depicted as easy-going, friendly, spontaneous, and curious about Earth. He is able to breathe and travel in outer space. He also enjoys doing human activities on Earth. He can make his cyan parts glow in the dark. He enjoys doing human activities such as sunbathing.