Everybody. He's not a mindreader of anything, but he can sense things like changes in temperature or blood pressure and things like that. Biological signs of a person's mood. But I've also programmed him so he's capable of mimicking and knowing when to throw out appropriate responses to different stimuli. It'd be pretty bad if somebody was upset and his reaction was to throw something at them or something instead of trying to offer assistance.

It's still a work in progress though. I'm teaching myself how to expand him.