She's an Asguardian Ranger. They mostly grow up on Feral Worlds, and are generally sent out alone, or in small packs of Rangers. So they don't play well with others, and don't worship/fear Commissars like most do. It'll take a while for her to bond with the rest of the guardsmen, and she does have predjuice, however justified or not, against the leader. A point where she can actually prioritize taking out the Commissar, and not get blamed for it, sounds pretty rare though, so he's got wiggle room to do proving stuff before getting a Las to the head.