From what Liz was saying, it sounds more like he didn't know how his role worked, right? I think it's more likely he was assigned it after getting here.

[ for...whatever reason. ]

The third party roles are built into the game, yeah? But whatever the fuck these alien demons are, they don't seem to be the third party roles the rules were referrin' to. So the Weirdling or what the fuck ever must be one of the third party roles Alice made up.

[ that makes sense, right? ]

There are way too many of us with vulnerabilities to make me like that angle. Shit.