Not being in any particularly complicated outfit, and not attached to the shirt he's wearing from the dressing carriage, Gyousou is soon using a section of the hem to wipe his hands between pickings.

He'll wash it in a stream later, and presumably it'll be no worse for wear.

"He is very wise," he comments, indeed needing another container, and returning to Roland's side to retrieve one. "Yes, I understand that feeling well. It has gotten me into a great deal of trouble... which is, I suppose, why Taiki is the way he is, to compensate."