Ulti is a young woman of middling height, with a light complexion. Her hair reaches near her mid-back and forms rounded locks mainly blue in coloration, but with thin, light-pinkish streaks running through. Blunt bangs fall on her forehead, split on the left, and an ahoge stands up on her head. Characteristically (as with many of her crewmates), Ulti has horns: a sharp, upward-curving pair emerging from the sides of her head, white in color, that resemble a bull's. Her eyes are large, round, fringed by long lashes, and encompass violet irises. Ulti's lower face up to the nose is covered by a light-pink mask with a scalloped edge, trimmed with a white stripe; Ulti keeps this mask even while she is transformed into a dinosaur leaving the appearance of her mouth unknown.
Ultraking is an average sized man, with wild white hair that resembles a crown. He has a tiny bit of hair on his upper lip and sports a black suit over a purple shirt and red bowtie. Ultraking seems to be a relatively calm person, since he didn't freak out when the Straw Hat Pirates entered his casino and simply called for security. He does, however, get quite apologetic to Miss All Sunday, who is the manager of the casino, when Luffy defeats the Koala Mercenaries. He was able to run a successful casino for a long while and had the authority to call on the Koala Mercenaries for help until it was shut down due to the Baroque Works incident.