@Recks
@qaumufun
So…what I found out a huge spoiler: When you go to another game world, your IQ falls a lot! 
No game, no life
Spoilers for the 2nd game
…and seriously, it wasn’t only my MC IQ which had fallen but also all the servants. Half of them caused their own deaths by being weird. It made no sense at all. This game was…stagnant.
Even the normal Werewolf/Mafia games I’ve played a decade ago were more fun.
I had assumed like Recks that Mozart was the Fanatic who knew that Marie was the Wolf. He did his best to bait me while protecting the Wolf since she’s the Wolf but also his love.
When the Werewolf dies, the game ends. It doesn’t matter if the Fanatic is dead or not. That’s how it normally is. Add in that the game did finish with fanfare and all that so it should be finished.
Jeanne did mention: “Something weird is going on so I don’t even know what’s happening anymore.” So I agree with both of you that Marie is sus. Plus all servants who went inside the game world have become weird. So it could be that Marie is the evil last boss. Still waiting for her Viva la Monde du JeuFrance. 
Oh, did you notice that all who Marie felt upset about or felt should get hanged died in the game. Even Amadeus who she said that she couldn’t keep protecting?
Also, both Marie and Erice got the same eye colour.
Now we wait for the next game…which will probably be better than this.