Uchiha Sasuke was sought out by the powerful senin named Orochimaru (Who wished to know the answer to everything, including immortality). Orochimaru "cursed" Sasuke by biting him on the neck. Sasuke now lives with the curse unallowed to use too much power or else it will "control" him. The first stage of this said curse shows black markings all over the left side of Sasuke's body. The second stage happes to turn Sasuke into a winged blue-skinned "vampire-looking" version of himself, with a cross like mark on the center of his face.
Uchiha Sasuke's alleged hatred for the main character Uzumaki Naruto is shown very well in the anime. Though, when fighting Naruto as Sasuke is departing to join Orochimaru did not have the heart to kill him. /If/ Uchiha Sasuke had killed Uzumaki Naruto he would have gained the powerful Mangekyou Sharingan in which you must kill your closest and best friend (As Itachi did weeks before killing the entire clan).
As Uchiha Sasuke serves under Orochimaru he is thought new abilities and how to strengthen old ones. Including a technique (or jutsu) he was tought by his former sensei (teacher) Hatake Kakashi called the Chidori (Lightning Blade) in which the user can manipulate lightning into a blade-like form. He then realizes that there is no more that Orochimaru can teach him and tries to defeat him. In the process Orochimaru (Who is in need of getting a new "host") starts a "ritual" in which Orochimaru tries to take over Sasuke's body. Though, Orochimaru is unable to finish the ritual due to fatality when Sasuke kills him.
<<It is true that most people get Sasuke incorrect. I dubb you all idiots doomed to loom in stupidity for your lives.>>
Me: Eww, what? No. His personality is fucked up.
He went to the main villian from part one, Orochimaru so he could gain the power to kill his brother, and also to impress his main girl, Kurenai. In chapter 500 it's revealed that Sasuke is the father to Kurenai's baby. sasuke is currently awakening his EMS, so he can easily crush Naruto (though the EMS power isn't actually needed)
and he is hot.who cares if hes a drawing.
but there are so many more hot characters on that show.
but seriously annoyingly obcessive fangirls do tend to get annoying.so stop fucking drooling over him k.like everyone says hes only a cartoon character.(who is hot)