maybe the demons didn't kill Nairu, but she killed herself on Hos) mainly, the second killing leads to execution
I voted for Areg based on the clue, and for the Witch based on the logic of the moves.
You can find clues, I assure you. Remember, there was something like "human-beast" (her avatar), for example. I'm already tired of explaining in detail. The Witch is one of the demons.
Added 1 minute ago
Perhaps I'll agree and vote for Tieru's execution.