My first official OC was a Naruto OC who was incredibly overpowered. She was Sasuke's cousin and a jinchuriki with a second tailed wolf demon named Yuki and she could do some crazy stuff with wind and tornadoes and the sharigan. 

I've since upgraded her immensely. She's still an Uchiha but her abilities have little or nothing to do with that side of her family. She takes after her Mom and grows to use the jutsus and abilities from her mother's side of the family.  (which are no where near as powerful. Powerful..but not ridiculously powerful)