Ava should have been paying more attention to the door as a look out, but let herself relax too much while watching Richie work. This was pointless, stupid, and... ugh, fun she admitted to herself. Fun.
Until somebody entered and her mission instincts kicked back in, head twisting in the direction of the door, glad for the mask that obscured her face and identity. It took only a brief moment before Ava flitted back out of visibility, and in moments like these it would be necessary to decide if leaving the scene or staying to fight better accomplished her mission objective. It was difficult to suppress the instincts to fight, eliminate the target before they had a chance to react. Except this situation was much more complex than that. Or maybe simpler.
Because Richie was still there, and she never had to worry about abandoning a partner before. And fighting seemed an unnecessary escalation. She stayed hidden, quietly approaching the intruder- no, not intruder, this was their room they’d broken into. But she moved in just in case she needed to hold them back while Richie made a getaway.