Oh! Sorry, I was unclear: Elsa is the mayor of the town and, because she's secretly hiding some vampires, is kind of reluctant to take big actions against the vampire attacks. I imagine at least some of the hunters would side-eye her a lot, possibly d'Artagnan included?
This isn't event-specific, but at some point Sebastian and d'Artagnan should interact too. Sebastian likes none of the Musketeers he's interacted with and they don't like him, and he's bffs with Constance, so. lots of piggyback CR possibilities there.