[It's subtle, the shift in his posture when he hears that. He tightens his grip on his crowbar, and slides his feet his a little further apart.

He can read the change in Shirou's mood well enough. He's been around a long time. He's seen a lot of dangerous people, and his worst enemy is someone who can smile easily and with complete malice. He doesn't trust that kind of behavior. He doesn't trust people in general, and his own friendly facade is slipping in response to the cracks in Shirou's.]

You should work on that, then. I can't have Mikado hanging around with villains, y'know.