Yes, the tone or sound of the voice didn't fit the era for one thing, and that mask was... not right. Hockey? Really? Her shoulders visibly relaxed as she drew back a bit, sighing. Okay so it wasn't a Plague Doctor, and this guy looked... out of Era. A local in the Library then? Maybe.

Her head turned a bit while her eyes stayed forward on him, a curious glance. "I might have been following someone, yes. But it looks like I lost track. You're from the Library, right?"