Arandor
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I don't know, but it seems to me that Siv is also one of the Mafia... I just have that feeling. And probably one of the girls too.
As for Revan, the evidence is pretty good, although the difference in the words "candle" and "firework" is a bit confusing, although it was also mentioned that the firework was a "Roman candle," so maybe it was just a change in the order of the words... I'll think about it a little more and I'll probably join in.
Be strong. Believe