Ceremonial battle harness
From Halopedia, the Halo wiki
The ceremonial battle harness features a smooth, organic thoracic cage harness; large, sloping shoulder pauldrons; and a long, back-swept helmet with mandible guards. The helmet and pauldrons feature decorative blue bands. Like the Evocati harness and the Infiltration harness, it does have red markings.
The Ceremonial battle harness was exclusively used by Sangheili Zealots, and most famously worn in maroon by the Devoted Sentries. Zealot Field Masters who were command positions and attached to regular Covenant military forces wore the same armor, albeit colored gold, similar to suits worn by lower-ranking Generals. The Ultra-class color scheme worn by Ultras (silver-white with black trim) is also used.
Field Marshal harness
List of appearances