Yes, I'm TL;DR essaying again. I know headcanon's something that gets to be a horrible point of contention - arguments over "Is it headcanon or is it OOC?", etc., etc., etc., "is it okay/valid to include headcanon in character interpretation?", "what's 'right' or 'wrong' headcanon", ad infinitum.
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Beware of Rhetoric Major )