User blog comment:B214/Volume 22 spoilers/@comment-30048084-20161031183100/@comment-10330822-20161113035609

Also, fun fact, one I don't know if has been discussed yet, that Miraka Voldenburg is probably also related to that. Baron Voldenburg was a character in the novella, that was a descendant of the original "hero" that killed Countess Karnstein, sort of similar to Van Helsing in Dracula. So, there's a chance Miraka is related to Elmenhilde and Carmilla Faction in some way.