Geez, AU! hater much? You'll probably notice you're also the only person who thinks that way. Despite the AU, that character happens to still retain many of their original traits, so fail!points to you for your claim. Not to mention her player is also a very good RPer, and isn't the type to make Mary Sues out of her female characters. And why this character? Why not any of this player's characters? Why the need to attack a character which is probably her best character? Is this a personal grudge you have against the player? Or are you just out to snipe someone for no reason other than the thrill of it?

This character, in my opinion, is very well played and well written. They're characterized very well, and I myself couldn't think of a better interpretation. Not to mention that, again, despite the AU!, this character still kicks ass and takes names, just as much as the original. And hell if the "lol she's on her period" excuse is used all the time. It was only, iirc, ever used a couple of times, and then it was never used again. Not to mention this character is also very much not "hormonal" and "weepy". They're a very strong character, with a strong will and strong personality, and the player never turned them into a female just to make them into a "hormonal, weepy, appallingly OOC Mary Sue". I can't see any Mary Sue-ishness in the character mentioned.

So maybe take the blinkers off and look past the "stereotypes". Taking an oft-used idea and making it into something good is this player's strength. It's why her character is such a well-played character in the first place.