The Mantis Lords, with some added flair lol.

The Traitor lord and the youngest of the lords, both on the far right share similar mask designs. I imagine they were close before the Traitor lord left. The Mantis lord in the middle, bears a mask made to honor the enemies in Deepnest, with the six eyes. The Mantis lord closest to the viewer has her own thing going on with her mask. The spikey things two of them are wearing are mementos from kills; claws and teeth from the creatures of Deepnest.