[Princeu]

Mary Sue is a generic term that's used to insult a character who is predictable and cliche. Think Bella from Twilight. She's your typical high school student and finds a cliche love with a vampire... that's considered Mary Sue, or Gary Stu.

Though some people consider characters who are outlandishly coloured, vastly different from the cliche and ordinary to my Mary Sue/Gary Stu.