[Loki's eyebrows shoot up, and he manages to force his expression into concern and dismay despite his sheer glee at hearing that Tony isn't a warden.]

Not an inmate, surely? Not you, who is one of Earth's great defenders?

[He forces a reluctant, concerned smile.]

Not that I object to your company, but... for my own part I understand how I have lived my life cast in this role. This is not the truth of you though...