"See that you do. But focus on your duties and get properly settled."

The only reason he cared about the tab is because it would be inappropriate not to, as a butler of the Phantomhive estates. Money is a meaningless concept to a demon. He abides by it because he has lowered himself into a position where it, suddenly, is a necessary inconvenience, a challenge. Where a human like Mey-Rin might find it necessary, a fact of life, Sebastian finds it a...strange little novelty, like a tourist coming back to his old stomping grounds to realize they still use the quaintly backward customs as they did all those years before. The only reason Mey-Rin must suffer a tab is because of appearances and custom. Not because he couldn't easily replace any silverware or furniture she has damaged or will damage.

Sebastian leads her down the row of shelves, after a point picking out a small jar of soothing lotion. A stop at the counter with the shop-keeper and then he'll lead Mey-Rin back to the landing, out of the way of the most egregious leaks in the roof.

"Here. Apply that to your arm," Sebastian says. "Generously, but do try to save some for later."