Oh, yeah, I forgot about that. They seemed pretty simple until Hilda met one of them as a normal teenager. Then it got way more complicated and weird.
Hilda's dad, library girl, and the Marras would probably be my top three things to ask about. Although I'd less want to hear an answer and more so get an episode in the second season about them.
Also, anyone else really like this sort of twitchy eye movement the characters would do when talking/looking at things sometimes? This is a sort of bad example, but an example nonetheless. Not the eye roll, by the way.
Also, the eye movement in general was really good. Really liked how expressive it was.