On N2, before Rat was “greenchecked,” I checked their ISO, particularly their interactions with Arctic. I found their interactions were pretty bad! I’ll pull that up when I have the time.
Furthermore, all of Rat’s mechanical information is either entirely cop-out (There is an NK), or stuff that Mafia is guaranteed to know (Astand visited nobody, there are 7 non-town in the game)!
We know the last Mafia is likely a rolecop, who checked Eevee N1, and Kyo N2. Vulgard needed a source of the accurate information D2, and their Kyo “paranoia” started on D3!