For now, I'll tell you a couple of facts. This character is a lizard, the image is based on Monster Kid, an undertale monster that also had no arms. But Ukstar is also blind, but he can see the world in a special way, like text or something like that. Clarification, the actual parts of the comic will start around part 3, there will be a more modern canon.
Old parts may differ from future expansions, so don't be surprised by a change in style or some factor in the comic.