Of course he was joking. Jasper decided not to even comment on that part.

"When you come with me to take a look around the castle, you know—in a few days, whenever—you should point out anyone who makes you uncomfortable like that," he said in what he hoped was a kind enough tone not to make Satou defensive. "So I can... better understand."

Satou would point out everyone, he suspected. Possibly even people who weren't there.