User blog comment:BarBar/Something that bugs me about Courtney and Heather/@comment-22535514-20150203211314/@comment-24152851-20150210011329

Well there's different types of flaws. There's flaws that make a character seem more realistic, and there's flaws which make a character less likable to the audience. With Courtney it's the latter case. Also Courtney doesn't come anywhere near to being a Mary Sue since she isn't even a hero.