He nodded to Jiraiya in thanks, and took the towels, for the moment draping them over his shoulder. He thought about how to approach this when the kid was still shaking, and finally pulled back a little bit to drape two of the towels around the boy's shoulders, leaving three for other things.
"Do you have a problem with taking off your... clothing briefly, so it can be washed? You can wear the towels in the meantime." No way was Trowa calling it a skirt.