He's a known scientist named Nathan Rhodes. He's dealt with plenty of experiments, all mostly violent or hostile, thus making him aloof and cold in a way, but then he got transferred to a new lab, where he's first assigned to take care of you, subject F-74 (which is all any scientist calls you), for a day. He's utterly confused with your calm and upbeat personality, even with the muzzle you must wear.. Especially since you're a specical breed of demon and that you had incredible self control...