Leliana is trained at observing many things. The glow of a green light playing over skin was the most obvious thing to catch, but other things called to her just as easily. Someone looking out of place, someone lost. These are things to be played upon and exploited, and they are things she has seen all to clearly in herself. There are arguably worse people that could meet someone looking so entirely out of place, those not aligned to the Inquisition, or those without knowledge - or worse still, the wrong knowledge. There were, also, a good many people who it was probably better to meet than Sister Nightingale.

Still, it has been a long while (too long) since Leliana was out in the field, and from the young woman's garb, she would hazard a guess that she was not of Thedas. A rifter, perhaps? Leliana stands from her table - which no one moves to claim - and moves closer to the young woman, hood pulled up as she makes a slow, steady approach. 'No sudden movements' seems a sensible course of action around the discombobulated.

"Forgive me," and her voice is not terribly apologetic at all, instead entirely calm and even. "You seem a little out of sorts. Do you need something to eat?"

The cold could do terrible things to you, and hunger and thirst on top of that? Dangerous. When they are still determining what the mark could mean, where it could lead the Inquisition, she would not see one with the mark be so quickly damaged.