All in all, Charles Xavier is an easy kind of person to get along with; he's simple by most rights. He likes his tea, his space and his sceince. Most of the tech people in the 'office' don't think the best of him, if anything they avoid him. He doesn't mind terribly, since he prefers his solitude. But he's still in a considerably higher position than most of him, tending to the mental health of the agents in ways only a telepath can ensure.
He's been here a long while, he knows everyone fairly well, and so it comes as a surprise when he sees an unfamiliar figure down the hallway from his office. An unfamiliar mind passing; he's polite of course, he doesn't go peaking, but he does jog after them.