Jon doesn't notice her at first. He'd never met her, so to him she's just another face in the crowd. A face he hasn't seen before, to be sure, with an undeniable sadness about her. But it's not until his second or third time scanning the crowd that his gaze lingers at all.

He doesn't know why, but now that he's noticed her, he feels compelled to talk to her, to make sure she's okay. She seems overwhelmed, and he knows what that's like, too.

He might not know who she is, but there are hints as to his identity. The Westerosi clothing with the embroidered direwolf sigil, the real live direwolf padding along at his side, and finally his similarity in appearance to Robb. And when he speaks, the undeniable Northern accent.

"Is everything alright?"