For now, it seems that the entire mafia team consists of Ment, Mortulus, Revan, and Arandor.
There's more than just circumstantial evidence against Arko; his selective passivity also points to him. I specifically checked several times: he was on the forum in the mafia thread, reading, but he only responded to defend someone's half-baked ideas. Moreover, those he was defending are acting very suspiciously.
Mika, regarding Karnor – in my overactive imagination, a post appeared where Olam wrote that Tramus only appears when necessary. That's why I missed the description of the person and reformulated the concern for safety into surveillance and restricting all actions.
But I corrected it myself later.)
Added 2 minutes ago
I was still right that I saw lines from the song "Bury me in Black" in someone's profile. But my absentmindedness let me down again; yesterday, I reviewed all the profiles for this, but I couldn't find it