Ringo of the fang

First a disclaimer: I do not own NARUTO,
Secondly: This is an AU from the point after Tsunade becomes hokage,
Thirdly: I own all OC's which also means if you want to use any of my characters in your own books ask first

Now the description...
Ringo Hatake is the younger sister of Kakashi, she is a chunin that has been training outside of the village hidden in the leaves with guru Sen.
Whilst meditating with her guru she reseeves an urgent letter from Tsunade to return to the village. For what she does not know. All that she knows is that it's urgent.