Tartarus is the last known Chieftain of the Jiralhanae to serve in the Covenant. He is Thel 'Vadam's primary rival and the tertiary antagonist in Halo 2 and acts as the Hierarchs' chief enforcer and Truth's second-in-command. He was placed in charge of activating the Halo Rings and arrived at Installation 05's control room to do so. However, the Arbiter, with the help of many Elites and UNSC forces, stopped Tartarus along with his Brutes and killed them. He was voiced by famous voice actor .