Cool is probably fine. In the wild she'd be swimming in rivers, so a chillier temperature isn't likely to bother her.

[He brings her over, making sure the door is shut behind him so she can't make a beeline for it and escape into the house, and motions vaguely in offer to hold her if Giorno wants.]

She mastered the stacking cups a day or two ago. How to put one inside the other and make them fit.