A-221 had a somewhat basic appearance, only being a mouth bearing its teeth with crudely drawn scribbles for eyes, similar to A-200. It would also shake rapidly and the entity emitted a glow with a cyan-like-colored hue, identical to A-245. A-221's mouth also appears to have similarities to its replacement, as both share the same source image for it, and the same color. They both have a green smile.