When iconic elements of a character's archetype are completely and utterly dropped or whitewashed. The sort of scenario wherein a character is explicitly one thing, by label themselves or said out of character, but in reality none of those assumed or thought of qualities actually exist; they're either tampered with, or so far off from reality that the "label" applied to the type is erroneous. This differs from those imagined by a character who may think one thing when their reality is not that; I mean when it is "explicit fact" among the fiction. My real motion toward this is of staples of fiction, where there can of course be variation of interpretations, but do not for a moment call something an X when it is clearly a Y then debate about how everyone else is wrong.

I would rather you invent your own non-existent silliness and base it off something else than argue that your character "Really is an X, Y or Z." when it has never come up or been relevant to the lore at all or contradicts it.