Ka D'Argo (called simply D'Argo) is a Luxan warrior who was imprisoned aboard the Leviathan Moya by the Peacekeepers after being convicted (falsely) of killing his Sebacean wife Lo'Laan in a fit of Luxan Hyper-Rage. During his time as a prisoner, the Peacekeepers shackled D'Argo in his cell with heavy chains attached to a pair of metal hooks surgically implanted around his collarbones to keep him under control despite his strength. He later escaped (along with Rygel and Zhaan). As a Luxan warrior, D'Argo carries a weapon known as a Qualta Blade, a heavy broadsword that can transform into a Qualta Rifle. His personality was paranoid and ill-tempered against his friends. He has a powerful tongue that he can shoot out fast, similar to that of a frog or chameleon. The tip can inject an "adaptive" venom which renders the target unconscious without killing them. D'Argo's consuming desire was to find Jothee, his son by Lo'Laan. After Jothee was found, his plans to settle down with his son and Chiana scared the Nebari girl, resulting in her betraying him. D'Argo and Jothee part on bad terms, but they are later reunited and somewhat reconciled. After being mortally wounded in The Peacekeeper Wars, D'Argo covers the escape of his comrades off Qujaga, which was then destroyed by Crichton's wormhole weapon. John Crichton and Aeryn Sun then name their son, born during the battle, D'Argo, in his memory.