You know, he probably calls her 'ms. willis' normally because it sounds suspiciously like 'Belity' when he uses her first name. He speaks very good English, but some words are tougher than others. His accent is apparently something he's embarrassed about. Normally.

"You're the first friend I made here that I didn't already go through the end of the world with." Katsuya shakes his head. "Of course I trust you." He rubs at the back of his neck awkwardly, and his gaze drops again. "Probably...I think I'd be embarrassed. A bit. To be seen acting a child in front of you." He shrugs. "It's hard to tell what I'm thinking is the magic and what is the memories."