[Marion]

Something I noticed:

Spoiler for Episode 1/2/3:

After Eva found the gold she went out and saw Rosa there, meaning Rosa also solved the riddle. If we say that then could we possibly apply a rule - "Rosa and X Person will always find the Gold"?

If that's the case then we can say for episode 2 that maybe one parent that died in the chapel was an accomplice. Then the other person, feeling a little greed, went after her and she killed them?

This can apply to episode 1 as well. We know that Krauss had a piece of the gold, from what he showed to Natsuhi. I have to wonder if he just found that piece from the others in the hidden location and lied to Natsuhi about having it for a while. He said that he didn't want to get Natsuhi involved, but involved in what? The discussion of inheritance? Maybe him and Rosa found it and she could have faked a corpse?

But then if we go for the: "Eva is the Culprit" theory in Episode 3 then who killed Nanjo? Was there a third person who found the gold and then died after killing Nanjo? Perhaps Hideyoshi, considering the TIPs?