Keeping vigilant to ensure the strict discipline required of the Guard is adhered to are the members of the Officio Prefectus (or the Commissariat) in old money.
First up, the two versions of Yarrick. I still prefer the Rogue Trader era original.
Severina Raine on her impressive base is ready to lead the way.
The original Rogue Trader era Commissars were less flashy and simpler than their later counterparts. I prefer the more mean looking types.
This us the mean looking type and all the better for not looking flashy. You just know he's shooting an enemy.