[At first the approaching noise barely registers. He's too tired, heart wrenched inside out and although he's usually cautious when it comes to being followed he can't bring himself to care right now. Of course, it doesn't take too long before his self-preservation kicks in and after a moment or two he does turn, brows furrowing at the sight of his attacker.
He... knows him, even half-hidden in the shadows like this. So many things are wrong with this picture, but he does know him and that's enough for Aidan to keep his guard down even though he really should know better by now. He tilts his head, voice rough and raspy once he speaks up.]