Is it too late to talk about Star Wars: The Force Awakens? Am I culturally irrelevant? Eh, whatever. Let’s do it. This isn’t really about Star Wars anyway.
One of the complaints aimed at the film is that Rey is “A Mary Sue”. As proof, it’s pointed out that she’s an incredibly competent character nearly from the get go, and she exhibits force powers beyond being believable.
So, first off, this is a movie about a science fantasy setting where spaceships and space wizards exist. That’s not a get out of jail card in terms of consistent or sensible storytelling, but it does render much of the criticism irrelevant. And for a series drawing on pulp traditions, the very idea of a “Mary Sue” is difficult to nail down.