This is Uchiha
Sasuke. He is from the famous Uchiha family who holds the sharingan in
their blood line. This is why Kakashi is so mysterious, becuase he is not part
of the Uchiha family, yet he has one eye with the sharigan. Sasuke is
well aware of Sakura's
obsession with him, but is so determined to avenge his family's
death that he appears cold and isolated.