Welcome to MS Paint UPick Mafia! You are
R.J. MacReady, Town Aligned Alien Hunter
You were employed as a helicopter pilot for a research station in antarctica, which was an alright gig until some sort of ancient alien creature was unearthed from the ice and began systematically killing and replacing all of your coworkers, which was less alright.
You have the following abilities:
The Thing [Passive] - An alien lifeform you've come to refer to simply as "the thing" is on the loose. It has the ability to perfectly mimic anything it comes into contact with, and thus anybody here could secretly be the thing, and somebody surely is. The thing is also particularly tenacious, and if any piece of it escapes death it can reform anew. If the thing is lynched, it will escape and mimic a random player on its wagon, and if its killed it will mimic a random player that targeted it that night.
Blood Test [Active] - Target a player at night to check whether they are human. The thing will never appear as human, though other non-human characters may also exist in the setting.
Scotch [Active] - Take a swig of your favourite J&B brand scotch whisky. The following day the value of your vote will randomly change to be worth either a little less or a little more.
Blow it all to hell [Passive] - If you and the thing are ever the only two players remaining, you automatically activate this ability to kill every living player, resulting in a town victory.