She's still exploring trying to get the lay of the land search out the best place for puzzle pieces to perhaps be hidden when she spots the guy sitting wearing only one layer of clothes.
Its cold as Hoth at night out here and the guys just...sitting there.
Jaina has a few Jedi Techniques to help with temperature and she's still freezing, her hands tucked as far inside the sleeves of her Jedi robes as she can manage. She hasn't bothered to change since her arrival here so its still a jumpsuit, blaster side arm, lightsaber and Jedi robes.