Mary Sue
A Mary Sue is a character who is so perfect that he or she warps the world around them to display their perfection. It seems as though nothing in this universe except Mary Sue is even real, and is instead a plot device to make Mary Sue seem flawless and loved. A Mary Sue can destroy a piece of writing or media, since the characters existence will often forcibly make the world and people around them defy logic to simply display how amazingly radiant they are. The term is meant to describe any and all characters that seemingly warp reality simply to display their perfection, but some people do use terms such as “Marty Sue” or “Gary Sue” as a male nickname for a Mary Sue. It’s also important to know that in an attempt to make a character seem less Sue-ish, authors will often give their Mary Sue a “flaw” that is actually just a stale trait in disguise. This has lead to many different sub genres of the Mary Sue, thigh all are just as boring and cliche as the original.
“Man, this character is so annoying! It seems like everyone else is out of character just because she exists!”
“Bro, she’s probably a Mary Sue.”