The Brute Ultra is a Jiralhanae rank. It is the highest rank of Brute infantry. The Brutes of this rank usually lead a small group of Grunts and at least two or three Minor Brutes and sometimes a Major. They appear to be roughly equal to a UNSC Lieutenant and second-in-command to a Brute Captain (unlike the Jiralhanae Bodyguard rank which presumably goes under the jurisdiction of the Brute Chieftain).