In the characters actions or instead of the idea of their magical actions, you can find the theme, or lesson when a certain problem is solved or unsolved.
I don’t know if this is right but I think it is a metaphor if it isn’t I am sorry
I am assuming that you are asking about Mr. Frank. He finds the secret room when he returns at the end of the war.
I THINKKKKKKKKKKKKKKKKKKKK
That she loves him verymuch.