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If there are spoilers above the example line, I think you'd have to leave it unspoilered, yeah? And I guess you could put (spoilers) in the folder title? It's a bit of a minor spoiler given how early in the campaign it is, but I could see leaving it as a warning for now and eventually it would become a Late-Arrival Spoiler.

So, in Critical Role: Campaign Three, Chetney is introduced as a Rogue, and it says so on his character card with stats (but those stats were inappropriate for a rogue, which did not escape fans' notice). Episode 11 reveals that he's not actually a rogue and had been lying to the party (and thus the meta information/the show itself had been lying to the players & viewers from minute one). What he is is a Order of the Lycan Blood Hunter - for the non-tabletop gaming tropers, that has nothing to do with a rogue -, which made his previously incongruous stats make sense.
Should the character then still be credited on the character sheet as Class: Rogue/[actual class], or should I simply delete the "Rogue" class and keep [actual class] spoilered, as the information was untrue in- and out of universe in the first place? The character's player flat out said "I'm not a rogue!" after the big reveal of his true class.