I don't see any peaceful Hive players on Dagr. Although they didn't use city abilities or block, I have a few other candidates for the city, and he's not one of them. Plus, I like the clue from Siever; it's quite good. Overall, my list of good guys is: Master, Siever, Kosha (the only negative I have for her is Dark, so I'm leaning towards her being peaceful), Heroist, and myself. The rest, namely Dagr, Haynes, Alexigla, and Vishmaster, I see as bad guys. And I'm ready to execute any of them without hesitation, just so no one wastes their votes. Although things are bad with the last two, but that's if we assume that Kosha is indeed Dark.

Added 9 minutes later
Execute Vishmaster. Why? Throughout the game, he wrote only five posts. Of those, only three were written during the game. I think with such passive gameplay, he is most likely a Mafia player, for whom his teammates are making decisions. Even the last vote was strange. He just cast his vote and that was it. And I don't believe that he's playing as a Spirit.