recalling her apology + reading her emotions at this moment has him instantly trusting her so he looks her dead in the eye and says "i was possessed by extra terrestrial pro-2817 from the planet classified as nh-11, that might be what's different." (it should be noted that he gives up info very, very easily) pre-pro reid would've been curious but also somewhat fearful of ro's ability because he doesn't like the idea of being watched, where as reid/pro would be asking her questions all the time about who she's talking to, who's in the room right now, what's their finished business, etc