The coward and scavenger of the group, he cannot be trusted. He hopes to one day gain leadership of the Mutants and hang Slithe's hide on his wall. Jackalman is also the weakest of the Mutants, but his fighting skills are formidable. Jackalman is a cautious and distrustful coward who leads the Jackalmen, a race of humanoid jackals. Though he is one to take any advantage presented to him, Jackalman often sides with Slythe to keep from being the scapegoat when plans fail. He also pilots a Skycutter.
In the 2011 Animated Series, though Slythe called him a "Jackalman", his real name is Kaynar. A deranged psychopath who was about to be placed in solitary confinement within a Dog Prison, Kaynar is recruited by Slithe to be one of Mumm-Ra's new generals. Though preferring his cell, Kaynar accepts Slithe's proposal when he mentions that he can slaughter Thundercats while allowed to "say goodbye" to his jailers. Prior to his debut, Kaynar's kind was seen in the episode "Legacy." During that time, a Jackalman named Shen assisted Leo and Panthera into overthrowing Mumm-Ra.