Helena isn't quite sure what to do. She looks to Sarah for instruction, gently but firmly catches Cosima's hand, and turns it over, holds onto it, briefly leans down to sniff at it.

"You smell much cleaner than many in Kirkwalls." A little shrug, awkward. "It is nice to meet you, sestra Cosima."

There is something a little stiff, almost robotic seeming in how she speaks, but the way she looks to Sarah for approval, to see if she did that right, might give away that she's not entirely as alarming as she appears.