Si Mukar

 is the chief of the Shuros Tribe.

Plot
After Senri faints, Mukar has him brought to a nearby military base. They bring along Cooro, Husky and Nana, as well as Igneous Giesrieg and his soldiers despite Mukar having been refusing to talk to the Astarian military. In response to Igneous's insistence, Mukar has Igneous undergo a trial to prove himself. He approves Upas's request to have Senri simultaneously undergo a trial. When Cooro, Husky and Nana go to spectate the trial he follows them, and ends up carrying Husky who gets left behing by the others. Upon learning of Amurui's appearance, he rushes to join the fight. Once the situation is resolved, Mukar informs Igneous that he passed his trial.