"No sir, I don't like it." Here's one of the disadvantages to hurtling through a show: with as poor a memory for minor characters as I have, this category of cel gets consigned to the "I have no clue" bin. He was a bonus cel and is obviously a guard, either one of the Machine Emperor's retinue or perhaps the guy who oversees mining activities in their prison camp. I hope maybe one of the other B't X fans out there will be able to help me out here.