first off I wanna tell you I like the idea of your character *spoiler* now that hidan is dead anouther akatsuki member can join sense there's only allowed nine at a time *End*.plus maybe since she's working with the akatsuki they don't want her demon. Only thing I don't like are the ears and tail. Kouni has no proof that demons show up more in the host then others. While there is much proof that it leaves hints. one reason no one would have ears and a tail is everyone would know there was a demon and team up on her. She would be killed. if you just got rid of them there would be no problem and I have to say your lucky my friend didn't see this or else.... well, let's leave it at this. I don't want to know her weakness ether. i would say add stripe like markings (maybe like shessomaru) it would look coool but not to over line.

wow really cool looking.......oh just to make you feel better

Mikino is not a Mary Sue...I know what one is (shes close but not it)
I think its a cool idea that you have her in the Akatsuki
I disagree with DTechnoLife.....some demons to show in the host more than others
I think she is really cool by the way
And it's a good idea not to give away her weakness..(builds suspense)

Well im basing my opinion on what you're giving me here, I dont have magical powers where I can fully understand everything about your OC and get inside your head there..if I did it would be pretty cool D: I digress, well back to the Jinchuurikki discussion, even if it is a lesser demon, Akatsuki would most likely try to capture it anyway. There goal is to take over the world so having every single demon would help regardless of how weak it is. Not sure if I spoiled anything for you but I think you're up to date, right? Even as a Jinchuurikki, ears and a tail is a little far-fetched. Hosts don't become the demon, which is what the ears and tail portray, but they do get little physical details(Yugito's slanted eyes, Naruto's whisker marks, and Gaara's dark circled eyes). Not all ninjas have to be from Konoha either, never said that. I'm confused how you say if she was normal, she wouldn't be an OC? She'd still be an OC but more related to the Naruto Universe. Well since you're writing an AU story then it wouldn't really matter if your OC was mary-sue. Well thats all i'll say.
Your random neighborhood critic,
DTechnoLife

Good luck on your story

Sorry I did not mean to offend you just offering advice.  and as you said not all  ninja's are from konoha but not all ninja's are missing nin or akatsuki ether. believe me I could have come in and sid "WTF this is a ^%$*ing Mary-sue she must die! Blah-blah" and you will get those people. (anouther reason is that there is really only two member''s on a team in akatsuki) I would help you tweak your character a bit to fit  so you don't have to worry about this(i always have my friend check mine to make sure they're good)

I agree with the person below me. I've studied mary-sues ALOT and your OC is very mary-sueish. Just for the fact your character has tiger ears, and I assume a tail too...? And uh, well one question, Why would your OC be in Akatsuki when they're after demons(There are only 9 in existence in the Naruto Universe)? Just something to think about. As for the weakness..your OC /must/ have a weakness or some major flaw. Its the first thing that separates your OC from being decent or a mary-sue.
This comment is not to offend you but to help you.
Good luck.

She dose have a tail, that's because she's more anthro. She dose have a weakness,I just don't want to give it away. You have to know her background to understand why she is in the Akatsuki. Her demon is a lesser demon, she is not one of the nine Junchuriki. I'm not going fully be the Naruto universe, if I did, she would be a normal ninja. If I did that, it wouldn't be much OC. I hate the thing that "All ninja must be from Konoha" thing. But, she's no more OC then the next Created character for naruto. Anything else you'd like to use aginst me to call her a mary-sue? I will pull out, that I am typing up her background and story line in my FF.net account (same name). So, don't misunderstand my OC, before you understand her.