Guuko, a Majin member of the Time Patrol. While better educated than the original Buu, Guuko nevertheless shares his childish demeanor, being a member of the Time Patrol not out of a sense of altruism, but because she enjoys the travel. She tends to be brought along as reliable muscle, as the thought of travel means she doesn't even mind more menial tasks if it means going somewhere new or getting rewarded with some sweets. Like Majin Buu, she enjoys children's books and gorging on sweets, which she can make with her head-tentacle, though she knows to never use it on other people. Still, she is very much a being of emotion and can be stubborn and difficult to reason with at times.

More of a quirk of her design, but her expressions invoke the image of the other forms of Buu. Her smirk has the curved, closed eyes of Majin Buu, but if she gets angry enough, her posture hunches over and her face literally distorts with rage and resembles Kid Buu.