You don't understand! A good player always refuses to play if they don't like the role. Only noobs and bad players continue to play.
Added 3 minutes later
In general, three people stand out in terms of psychology - Sab, Dashenka, and Dag. Knowing Dag, he's less likely to be the Mafia. But Sab, in my opinion, is quite possibly Mafia. Firstly, his excuses yesterday were unconvincing, and today his arguments for executing Torii are strange.