Papyrus is a tall skeleton with semi-closed eyes, has a scar (Shown on a ton of FanArt) and a sharp teeth. He wears a red cape, a pointed black battle body with a golden symbol on the left, long red gloves, black trousers with a red wrestle mania belt and red heels with 3 black stripes.
Papyrus loves evil puns, but he hides this very well. He, like Sans, tries to be cool and collect. He gloats a lot. He doesn't laugh, but snorts. He also "HMPH"s.