As a hermit and introvert (I have not spoken to a friend in over 3 weeks. I have not seen a friend in over 5 months. I have not spoken to anyone outside of commercial transactions in that time), I can say that Marigold is being an ass.
Admittedly, she's awkward enough that she probably is unaware of that, but she has invited an friend into her home and proceeded to read tiny hentai while that friend is attempting to engage her.
Context unknown, if you really just what to read tiny hentai, you don't invite friends over. If friends show up unexpectedly, you either have vaginal fortitude to tell them it is tiny hentai time, or you put the book down and welcome them into this slice of your life. No matter how rude the other party ma have been in not providing warning, once you let them in, you have taken responsibility.
That said, Faye Whitaker burned down a building, terrorized her friends to the point where they seem to have PTSD with regard to her, and had hot makeouts on Hanners's couch. Faye has not been abandoned by Hannelore (or incarcerated), so I expect Hanners is going to be able to deal with Marigold too.
In fact, the only friend Hanners seems to have who isn't a repeated challenge to her abilities is Marten... at least on Earth.
I'm an introvert and a hermit because there aren't enough actual Martens and Hannelores in the world. I don't even know if I'm difficult to put up with.