So, I read this fic, and the immediate thought I had was "This OC is such a Mary Sue!", but I tested her on several tests, and some said she was a Mary Sue, but some say she wasn't.

The main reason I think she's a Sue is that she's an FBI agent despite being five years too young and she's the one who saves the day.

You be the judge: [https://www.fanfiction.net/s/9385981/1/Look-After-You]