Comet is a humanoid female and member of a group called the Ultra-Cadets, who defend their planet and people from evil. she is voice by Tara Strong
Comet went to Earth to find Coop, but instead she mistook Coop for Jamie. She and the others needed Coop's assistance in fighting the Kurdock, so Jamie fooled her into taking him instead. Comet agreed that she and the other cadets would not be of much help to Jamie, so they agreed to let him fight Kurdock alone. After Jamie appears to defeat Kurdock, Comet and the other cadets hold a celebration on Jamie's honor. Just then Coop and Kiva arrived looking for Jamie. Not aware of what is going on, Comet attempted to defend Jamie from what she assumed was a threat. Once the truth was revealed that Jamie was an impostor. Comet, along with the others angrily insisted that Coop and the others get him off their planet. In the end, the Ultra Cadets were attacked by the Kurdock, but it's unknown if she survived, she apparently did survived luckily.
Comet's fuku consists of a white leotard with a blue collar that has three stripes on it, light yellow shoulder pads, and a blue skirt, along with a blue bow on the chest and at the back. She also wore a pair of blue knee-high boots with a white border at the triangular top.