I would be real surprised if this whole arc ends and the marquis has zero ties to demons. Having a "naturally weird" face is one thing, but paired with him having an evil forehead tattoo too, it seems a bit too on the nose to not be relevant at all, lmao. With him being presented as cunning/calculating, I wouldn't be surprised if he turned out to be a bad guy, but just not the current one, where he's basically enlisting Elma for the 2-for-1 of making himself seem good/clearing his own suspicion in relation to this crime, while also getting Elma to do his work for him (clearing out the current bad guys, who're inadvertently messing with his plans).
Hmm, why is there a romance tag?
It has been like 80 chapter+ and not a single romancing is happening lol
Well, we did basically just have soft confirmation that the jester girl has the hots for Elma, considering how her + Snow were the only ones to react to Elma's marriage offer (in basically the same way). Might be nothing now, but I wouldn't be surprised if it turns into something down the line. I guess it's strange for that to be enough for a romance tag, though.