Roier is a human, resembling the appearance of his creator IRL, who wears a Spiderman hoodie and a signature headband. In fanart, he is commonly depicted with spiderlike features such as: six arms, pointed fangs, or additional eyes. Although he usually changes appearances. After being betrayed by Spreen and Quackity, his original appearance was more torn and he grew out a stubble. He cleaned up later on for the egg event, but later changed outfits to match his 'Melissa' persona for Las Casualon