The leader of the Aqueons who had their water freighter stolen by Mutilor. When rescued by the SWAT Kats, he showed them the way to the bridge. Despite claiming that Aqueons did not fight, Grimalkin nevertheless kicked the blaster out of the hand of one of Mutilor’s henchmen during the struggle to retake the ship. As thanks for the two kat pilots helping them regain their ship, Grimalkin had his technicians repair the battle damaged Turbokat.
“Grimalkin” was the original name for the Aqueon race in the script for When Strikes Mutilor, and the character who would become Captain Grimalkin was originally named Kwi-Ess.