Maybe there's no malice in Rico's plastic smile, but Garrus certainly feels it. He's regretting his choice of words, certain that - at best - Rico's going to be looking for some way to make sure anything that little thing that happens on this mission that isn't perfect to the letter is going to get pinned on him.

As Rico calls out to him - that condescending, honeyed pleasantry dripping from his voice - there's a small part of Garrus that wants to take a big step back in his personal development and put a stun round into Rico's back. He'd have hell to pay when he got back, but Garrus would feel a hell of a lot better about this whole thing if he was going it alone rather than with him.

Not to mention it'd be pretty damn satisfying.

But no. He's playing nice for the sake of the Legion, for the sake of being the bigger man, and out of principle. He's not going to dignify Rico's last jab with a response, but he follows.