I guess Hans wasn't her type of a man. I don't blame her.
Ignoring the fact everybody's personality seems to fluctuate a lot depending on the situation, like Hans now getting instantly talked into submission despite the fact he seemed to be a master of it against Adlet and Adlet now coming up with fancy theories despite being unable to say anything against Hans, I don't like how all the thinking always goes to waste by plot devices that just conveniently happened to be there and that somebody just happened to know perfectly. If the fricking fiends knew the barrier won't work without those wooden things underground (I wonder why they aren't thoroughly rotten in that damp place already), why didn't they dig up a sufficient portion of them to make the barrier useless? We have seen big and strong fiends that must have as much strength as an excavator, so it would have been easy enough. No fancy unbreakable temple to worry about, just some wooden poles under the surface layer of dirt. I find it pretty hard to believe the fiends would actually have been planning for centuries to trap the braves inside their own barrier, instead of removing the damn thing. That's like betting on 1% when there's absolutely nothing wrong about the rest of the 99%. This arc stretches forever because of shit like this.
Maura seems more and more guilty all the time. She was very quick to decide Adlet must be guilty and very good at shooting down any other alternatives. There's logically no way Hans wouldn't realise this, Flamie as well after spending time with her. I don't know if she is the guilty one, but if she is, I pray to whatever gods they worship on that island that the story doesn't try to reveal it as a huge surprise.