Pitiless

Pitiless was a Covenant vessel operated by Kig-yar. During or before 2524, the High Prophet of Restraint ordered all Kig-yar vessels to be searched by squads of Sangheili and Unggoy after the Pitiless was found with "an Unclean being's" corpse aboard. This corpse was likely that of a human, as the Covenant are known to refer to humans as "Unclean".

List of appearances
Halo Wars