A "Mary Sue " is not a character that you hate, it's a character in a story (anime,cartoon,visual novel, literary novel or movie) that is seemingly perfect, has no visual flaw and everybody loves her.
It's common that people use it as an insult though…
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Umbrella
Mar 13, 2015 at 02:32AM EDT in reply to
Arachnos
Mar 12, 2015 at 05:34PM EDT