This sort of altruistic behavior is something he's not entirely familiar with. In the Order, there's a hierarchy of things to be done but there's no altruism - if it doesn't fall in line or isn't efficient, it isn't allowed.

"Thank you." The words come out slowly, scraped like rusted metal, and he wonders how long it's been since he's used them out of genuine thanks. Ren doesn't entirely remember but he suspects it must have been when he was last with his uncle.