This is ridiculous, but it is the kind of ridiculous that implies the danger has passed for the time being. Cheese violations and Mr. Rochester are frivolous distractions. Lan Wangji can set aside his tentative regret for having put his sword away. He does stick reasonably close to Thursday's side as they walk. She has just suffered a minor shock, ostensibly; he would make himself available to assist her in the event that she is feeling unsteady.