"I think he'll be worried," Xavier said honestly. Although that might just be him imagining that Master Beau would feel the same as he did. He was worried for her. But that wasn't all of it. "I also think he'll feel much better for you being here, miss."
Because they were alone, and addressing her as miss was something he had done almost as long as he had remembered. Almost; he also remembered being switch-taught not to call her Viola, when he was a child. The point was, calling her that called back to how long they had known each other, and that was likely why he added what he did next.
"He won't be the only one."
Master Beau feeling better would make all of the staff feel better, although there was also the fact that Xavier liked it when Miss Viola was around, in her own right.