Arsenne follows Eirina's instrcutions, leans his Glaive against the well, fills up his waterskin, and allows her to purify the water, all the while watching her intently with a slightly bemused smile.
Once done, he takes a sip, nods at Eirina and, still smiling for some unknown reason, says : "Thank you."
He thing picks up his Glaive and follows Thikha'Ness.