Mafia 90. The Tale of Oldforest.

Aries clearly gave himself away; on day one, he went into the night-night-vote (NNV), and then you added him last, while Aries and Olam went into the NNV at the end.
When it was Heroesist and Revan alternating on the vote, then everyone started voting for Revan, and then they started targeting Heroesist, whom Aries was so fiercely defending, which was a clear giveaway.
So, there are reasons to suspect that Aries is likely a Mafia member.

Is Aries definitely Mafia? Well, he has a strong voting record, but without any execution results, such a categorical statement seems a bit strange.