Character Description: Sasuke Uchiha

Sasuke is one of the top scorers of the ninja apprenticeship school and the top "Genin" (rookie/first-level ninja) of the Village Hidden in the Leaves. He is the sole remaining member of the Uchiha clan, a once powerful ninja clan of the village. He is very dark and serious, and is focused on nothing else but training to become a stronger ninja.

All of this is for one ultimate goal: revenge. His life's ambition is to grow powerful enough to kill "a certain man" (his older brother Itachi). As part of the Uchiha clan, Sasuke has higher "chakra" (spirit energy/chi). He also has a technique to blow fireballs from his mouth.

Also, as one of the Uchiha clan, he inherits the clan's Kekkei Genkai (or bloodline trait)--the Sharingan. He begins to unlock it in the fight with Haku (who himself was using a Kekkei Genkai) and it gradually gains strength as he learns to use it to track movements and observe ninjitsu techniques. It helps having a knucklehead like Naruto as a teammate. He doesn't like Naruto at first, but as they and Sakura learn to work as a team, he shows a surprising willingness to protect Naruto. It's the beginning of a pretty complex teammate/rival relationship, as each watches for the other but at the same time wants to become better than the other.

When Sasuke fought Naruto, they each use a powerful jutsu. Naruto use Rasengen and Sasuke uses Chidori. Chidori, also known as Raikiri (Lightning blade), is a jutsu taught to him by Kakashi.