[Well, he doesn't seem to be mad at her for her presence, so that's a good start. As much as most humans have never seen a monster, Alphys' interactions with humans before Hadriel was incredibly limited- and at least mildly violent- so it's hard for her not to be a little jumpy.]

Uhm... no. I just heard that, uhm, t-this team had set up some sort of quiet space, uh, here? I thought I'd come. See. W-What everyone was doing.

[Which isn't a lie; she's team Fear, but she has no intention of doing something scary with this place. Then again, she could probably get a cheap thrill in just by shutting off all the lights, but that just feels mean to kick down everything this team's been working so hard for.]