Uchiha ... Sasuke.

"My name is Uchiha... Sasuke. No, not just plain Sasuke, or even Uchiha Sasuke. You need the pause, you know? It's Uchiha... Sasuke. And, I'm an avenger. I swear my brother is such a jerk. So yeah, I need to kill him and all, he's that much of a jerk. My childhood life sucked because of that jerk -- I'm going to spend more than three quarters of a book telling you this, though nobody cares much. I'll also remind you with lots of flashbacks, in case you forget, you know? Even though you don't care.

Did I mention, I'm twelve. And yes, I'm an avenger. I need power power power POWER POWER! I'm soooooo cool."