I did not know any of these details and they make a lot of things that I said obsolete.
I treated Reinhardt as a human convict who's under constant supervision, not a literal bored demigod, as I have to admit I haven't read the story, so I was answering from the point of taking your first edit...
While I'm in no way considered a proper writer, so it's best to take my word with a grain of salt. But other than what MFontanta said (Which is a damn good advice) in the aftermath of asking the HOW question, you must ask Now What for your character. because we as human beings are naturally...