About Naruto and co.
Naruto
Naruto was born the son of Minato Namikaze and Kushina Uzumaki. His name was taken from the lead character in his godfather Jiraiya's first book, a persistent ninja that Minato had intended to raise him like. Soon after his birth, the Nine-Tailed Demon Fox attacked their hometown of Konohagakure, leaving destruction wherever it went. In order to stop the fox's attack Minato sealed it within Naruto's body, giving Naruto access to its great power at the cost of Minato's life. Before his death, Minato requested that Naruto be viewed as a hero of the village rather than a container for the fox. Many villagers chose to ignore this request, leading to the enactment of a law forbidding anyone to speak of Naruto as the fox's host.
With his father dead and his mother presumably sharing the same fate, Naruto has never known his parents. Although knowing that Minato sealed the fox within him, Naruto is currently unaware of their relation to each other. Despite this, Naruto is the spitting image of his father and many characters confidentially find the two have a number of other similarities. The abilities he learns and begins to utilize as he gets older are also reminiscent of those used by both of his parents during their lives.
Sasuke
The early years of Sasuke's childhood were spent living in the shadow of his older brother, Itachi Uchiha, who had proven time and again that he was a genius in the ninja arts. Because of Itachi's successes, most of the members of the Uchiha clan looked to Itachi as the clan's future, the biggest proponent of this idea being Sasuke's father, Fugaku Uchiha. Due to this focusing on Itachi, Sasuke did what he could to prove himself to his father, though no amount of training could help him in surpassing the milestones set in place by his brother. Itachi, aware of Sasuke's struggle for recognition, tried to shift some of their father's attention to Sasuke, even offering to train Sasuke in various fields of ninja abilities. Although Itachi succeeded in getting Fugaku to spend more time with Sasuke, much of that time was still dedicated to Itachi, and all the while Itachi never lived up to his promises of training Sasuke.
As time went by, Itachi's standing in the clan began to falter as his trustworthiness was constantly called into question. At this time, Itachi also began to create a more competitive relationship with Sasuke, challenging Sasuke to surpass him. Because of Itachi's changing personality, Fugaku began to take a more active interest in Sasuke's development, teaching him the Great Fireball Technique in less time than Itachi had taken to learn it, which also gave Sasuke proper membership into the clan. Most prominently, Fugaku encouraged Sasuke to not follow in Itachi's footsteps, the former prodigy of the clan having lost his father's confidence.
Soon after receiving the attention from his father that he had so yearned for, Sasuke returned home late one evening to his horror to find all the members of his clan dead. After finding Itachi standing over the bodies of their parents, indicating he was the one responsible for the clans' murders, Itachi informed Sasuke that he wasn't worth killing. As he left, Itachi repeated his encouragement to Sasuke to hate, to hold grudges, and to train his evil to become strong enough one day to surpass him, and disappeared into the night. From that day forth, Sasuke lived as an orphan, longing for the parents that had been taken from him and allowing his brother's words to fester. Soon after the clan's annihilation, Sasuke's only goal in life became to gain power through any means necessary in order to kill Itachi and avenge the clan.
Sakura
Unlike her teammates, Sakura's childhood was devoid of any actual tragedy, only being bullied in her early years at the Academy, where her sensitivity about her large forehead caused her classmates to tease her. Ino Yamanaka befriended her and gave her a ribbon that could accent her face and show others that her forehead didn't bother her. With Ino's friendship, Sakura came to develop her own identity and self-confidence. As Sakura's confidence in herself grew, she developed a crush on Sasuke, who Ino also had a crush on. When Sakura found out about this, she ended their friendship so that the two could properly compete for Sasuke's affection or even his friendship, beginning a bitter rivalry between the two best of friends. The two maintain this rivalry until the end of their match in the Chunin Exams, after which they begin to rekindle their friendship. Nevertheless, the two maintain a competitive relationship and constantly attempt to outdo the other at nearly everything.
Jiraiya
As a child, Jiraiya and his former teammates, Orochimaru and Tsunade, were students of the Third Hokage. After leaving the Third's tutelage, he traveled the world and discovered the residence of the toads, who trained him to call upon them in battle. During this time a prophecy concerning Jiraiya was told, dictating that he would travel the world while writing a book and meet a child who would either revolutionize or destroy the world. During his travels, Jiraiya and his former teammates fought with Hanzo, who rewarded their ability to survive his attacks through the title of "Legendary Three Ninja" (伝説の三忍 Densetsu no Sannin?). Soon after this Jiraiya met Nagato, a boy he believed to be the child from the prophecy. Jiraiya trained Nagato and his friends, hoping to steer the boy down the path of good before returning to Konoha.
Upon his return, Jiraiya became the sensei of Minato Namikaze and two other unknown Genin. Years later, when Orochimaru betrayed Konoha and fled the village, Jiraiya pursued him, trying to convince his friend to come back. He failed in his attempt and resumed his travels of the world, wanting to follow Orochimaru's movements as well as the organization Orochimaru eventually joined, Akatsuki. Sometime around this time, Jiraiya was made the godfather of Naruto Uzumaki by Minato and Kushina Uzumaki because they decided to name him after the lead character in Jiraiya's first book.
Kakashi
Like his father, Kakashi is considered a genius shinobi, graduating from the Ninja Academy at age 5 and achieving the rank of Chunin at 6. A few years after these accomplishments, Kakashi's father was disgraced by the village for abandoning a mission in favor of saving his comrades, which cost the Land of Fire dearly. Deeply ashamed and ostracized even by those he had saved, his father committed seppuku, leaving Kakashi to bear witness to the event. After his father's suicide, Kakashi began to adhere strictly to the rules of the shinobi – in particular the rule dictating that the success of the mission must come before the well being of one's team mates, causing him to become arrogant, humorless, and by-the-book.
At the age of 13, Kakashi achieved Jonin status. As a reward for his accomplishment, he was assigned to lead his team on a sabotage mission to blow up a bridge in order to prevent enemy forces from attacking Konoha. Shortly after the mission started, Kakashi's teammate, Rin was captured by enemy shinobi. Kakashi's other teammate, Obito Uchiha immediately stated his intention to save her, but Kakashi said they had to focus on completing the mission, opting not to make the same mistake his father had. Though Kakashi believed that they had to complete their objective and they parted ways, a little reflection on Obito's words and Rin's prior kindness eventually convinced him that his father had done the right thing in saving his teammates. This revelation prompted Kakashi to turn back to join Obito in the rescue effort, although he initially claims that he did not believe Obito could survive on his own—a statement that is more or less supported by how his arrival coincided with saving his oblivious teammate from a ninja's attack.
During their attempt to save Rin, Kakashi lost his left eye as a result of taking an enemy ninja's attack for Obito. To protect Kakashi in return, Obito managed to awaken his Sharingan and killed their assailant. Soon after saving Rin, a rockfall technique was triggered and a rock struck Kakashi on his blind side. He would have been buried beneath the rocks had Obito not pushed Kakashi out of the way, getting the right side of his body almost completely crushed in the process. Shortly before he died, Obito had Rin (a medical ninja) implant his Sharingan eye in Kakashi's damaged eye socket as a gift. As his first act with his new eye, Kakashi avenged Obito by killing the enemy ninja with his now-perfected Chidori technique, bringing the Kakashi of today into being.
Years later, Kakashi became a member of the Konohagakure ANBU where he served as a squad leader. During this time, he had several kōhai, one of which was Tenzo, who he recognized as the most successful of his kōhai. It is unknown when or why he left ANBU, but he still wears his gloves, a characteristic of ANBU uniforms.
Orochimaru
As a child, Orochimaru and his former teammates, Jiraiya and Tsunade, were students of the Third Hokage. Because of the three's exemplary skills, they were given the title "Legendary Three Ninja" (伝説の三忍 Densetsu no Sannin?) by Hanzo, with whom they battled and managed to survive against. Orochimaru's parents died when he was young, leaving him to fend for himself for much of his life. After taking him on as a student, the Third recognized Orochimaru's natural talent as well as malice and a lust for power within him. The Third chose to ignore these traits, hoping that he could quell this part of Orochimaru's personality. Despite the Third's efforts Orochimaru always retained his dark ambitions and began to act upon them once leaving the Third's side.
Over the years Orochimaru began to crave immortality, wishing to use the extended life to learn every jutsu in existence. To accomplish both goals Orochimaru began abducting villagers and experimenting on them in secret, trying to find ways to extend his life as well as replicate jutsu and abilities he could never learn by himself. While he carried out these experiments, he also tried to acquire the position of Hokage in the hopes that such a position would allow him easier access to secret jutsu. Although the Third had hoped to pass the title onto his favorite student, Orochimaru's desire for power and inability to accept the beliefs required of a Kage forced him to pass the title to one of Jiraiya's students, Minato Namikaze. Robbed of his only reason to keep face in Konoha, Orochimaru began to be less discreet with his abductions and experimentations, allowing the Third to eventually discover what Orochimaru was doing. Upon being found out Orochimaru gave his former master the chance to kill him, but the Third couldn't bring himself to do it, thus allowing Orochimaru to escape. As he fled the village, Jiraiya, having come to think of Orochimaru as a dear friend, tried to stop him and persuade him to return to Konoha; though Orochimaru refused and turned his back on Konoha forever, acquiring a hate for his former home and a strong desire to bring about its destruction.
After leaving Konoha, Orochimaru joined Akatsuki, where he was teamed with Sasori. While what he did while a member of the organization is unknown, it is known that he tried to take control of Itachi Uchiha's body so as to gain the Sharingan. Itachi used his Sharingan to stop the attempt and severed Orochimaru's left hand as punishment. As a result of this failed encounter Orochimaru left the organization with his ring and a book containing all of the organization's secrets, and Akatsuki has hunted him ever since. At some point in time Sasori inserted Kabuto Yakushi into Orochimaru's ranks as a spy, with special interest in recovering the Akatsuki ring, though Orochimaru soon became aware of this and persuaded Kabuto to side with him instead. Orochimaru would go on to take over the Land of Rice Fields where he created his own ninja village, Otogakure, filled with ninja loyal to him. Orochimaru also built a number of secret bases throughout the Naruto world that he switches between on a weekly basis.
Tsunade
As a child, Tsunade and her former teammates, Orochimaru and Jiraiya, were students of the Third Hokage. Because of the three's exemplary skills, they were given the title "Legendary Three Ninja" (伝説の三忍 Densetsu no Sannin?) by Hanzo. Because she is the granddaughter of the First Hokage, the word "Hime" (姫, "Princess") is often attached to her name. In the English anime, it is translated into "Lady Tsunade." Tsunade is known for her large breasts, despite the fact that Jiraiya referred to her as "flat-chested Tsunade" during their childhood.
Tsunade's most noticeable possession is a necklace that belonged to her grandfather. It is said to be valuable enough to buy "three gold mines and the mountains on top of them." On her brother, Nawaki's, twelfth birthday, Tsunade gave the necklace to him, in the hopes that it would help him achieve his dream of becoming Hokage. The next day, Nawaki died as one of the many casualties of the war going on at the time, and the necklace was returned to Tsunade's possession. It was this event in her life that would inspire her petition to place a medical ninja on each team. While this idea was initially turned down due to limited funds during the war, it was eventually put into effect. Sometime after Nawaki's death, Tsunade fell in love with a man named Dan, who also wanted to become Hokage. As a sign of her affection and in the hopes that it would help him achieve his goal, Tsunade gave him the necklace as well. Dan, too, would go on to die a bloody death during the course of the war, despite Tsunade's attempts to treat him. Once again, the necklace returned to Tsunade's possession. With her spirit broken, Tsunade left Konoha with Dan's niece, Shizune, taking her in as her apprentice.

