Finnnn. Finn doesn't know Eli quite well enough to be devastated, but will be sad because Rory and Cookie Lady are? HOWEVER I'm fairly certain the bites happening within their walls will give him a little bit of a 'wanting to get out of here, it isn't safe' kind of thing. Not that it's safe anywhere, but there's Finn for you.
Also I would looo-ooooveee to have Finn's sister (or brother, more sticky) pop up but that is always so!
It's terrible timing, but Finn made a gigantic movie screen and got a projector. He basically made a drive in movie theater. Everyone will be too sads to use it now but um, someday!!
Also, all the everything. He should probably branch out a little bit, socially...