Sasuke Uchiha

The second son of Konoha Military Police captain and Uchiha clan head, Fugaku, Sasuke grew up in the shadow of his older brother, Itachi. Itachi was an acknowledged prodigy who graduated at the top of his Academy class at age 7, mastered the Sharingan by age 8, became a Chunin at age 10, and an ANBU squad leader at the age of 13. The Uchiha clan took great pride and interest in Itachi and viewed him as a genius whose work would further strengthen the bonds between the village and the clan. In particular, Sasuke's father took an active interest in Itachi. Itachi, on the other hand, was rather ambivalent and full of oddly conflicting undercurrents, acknowledging Sasuke by taking interest in his progress as a ninja when even their father did not, but spending little quality time with Sasuke. Even after Sasuke enrolled in the Ninja Academy, he still was unable to escape Itachi's shadow. Despite consistently scoring at the head of every class, Sasuke failed to receive any recognition from his father, who defined Sasuke's success only in terms of his older brother. Itachi acknowledged the rivalry Sasuke felt, telling him, "We are unique siblings. I am the barrier you must overcome, so you and I will continue to exist together."
Itachi's relationship with his father deteriorated further when Itachi was questioned by other members of the Uchiha clan regarding the death and suicide note of his best friend, Shisui. As Itachi's behavior became increasingly bizarre, Sasuke's father, on a whim and partly due to Itachi's growing distance, decided to spend time with Sasuke. He taught him the Great Fireball Technique, a common family jutsu. Sasuke (age 7 at the time) proved himself to be a genius as well in his own right by succeeded in performing the jutsu in front of his father after only one week of training, surprising him. At that moment, Sasuke finally received his father's recognition; the Uchiha clan considered the ability to perform fire jutsu as proof that one had become an adult. Sasuke's father told him that he could now proudly wear the clan's emblem on his back. More forbiddingly, Sasuke also received a stern warning not to follow in Itachi's footsteps.
Shortly thereafter, Itachi massacred every member of the Uchiha clan, sparing only Sasuke. Itachi said that Sasuke was not even worth killing. In addition, Itachi told him, "You've always wanted to surpass me. That's why I'm going to let you live." Itachi also revealed to Sasuke where the secret meeting place of the Uchiha was hidden and suggested that Sasuke go there to learn what the true history and purpose of the Sharingan is. Sasuke thought he has fainted after this, but he recently remembered that he managed to stand back up, awaken his Sharingan and chase after Itachi. Sasuke managed to knock off Itachi's headband, and Itachi was seen shedding a tear after picking up the headband and reapplying it to the side of his head and he beat Sasuke who awoke in the hospital not remembering anything but what Itachi showed him.