Neal / Garrus
Well, Garrus really had no intention of talking him out of it. Neal obviously wasn't going to rest until he knew something about this boy. And Garrus also knew his friend wasn't a moron - he must have weighed the pros and cons, ran the most likely 'what if?' scenarios through his head, all before making the final decision.
After another sip of beer, he continued. "So what are you going to do if you do find him?"