Mettaton is intent at making himself look good, so he's going to be searching Woodhurst Watch, since he. You know. Works there. As he's been chatting with Peridot, he's come to the most dramatic conclusion (thanks, movies): there's foul play somewhere here. He's trying to find any notes or reports that contradict what was actually printed and signs of a hush-up.

Since his desires are far from harming humans, he'll most definitely be trying to subdue any infected. He's kind of a walking stun-gun, after all, and will at most be zapping anyone that attacks him.

Also hugs and singing. Very comforting.