He sees the tilt of her head but doesn't comment on it. If she doesn't want to tell, that's fine. Until he sees signs that whoever she recognized is hurting him. Then there will have to be talks (his habit of trying to take responsibility of people he hardly knows is showing again, but he doesn't give it much thought for now).

"Hmm, strangers. Probably the people who come up to you and insist on keeping you company even though you said once that you'll be okay?"

Like me!