Kakashi Hatake (はたけカカシ, Hatake Kakashi) is a Konohagakure Jonin, a former ANBU Captain and the former leader of Team 7. He is the son of Sakumo Hatake and, like his father, Kakashi is regarded as a genius among his peers. After his meteoric rise through the ninja ranks, Kakashi became the student of Minato Namikaze, and subsequently became a Jonin during the Third Great Ninja War. Following the war, Kakashi earned renown fame for his use of the Sharingan, earning him the moniker Copy Ninja Kakashi (コピー忍者のカカシ, Kopī Ninja no Kakashi).
Kakashi is the son of the genius ninja, Sakumo Hatake who had respect on par with the Sannin. Like his father, Kakashi has been known since a young age as an extremely gifted ninja, regarded by many as the best of his generation. He received top marks and showed an innate aptitude for the ninja arts while in the academy. This allowed him to graduate from it in a single year at the top of his class at the age of 5, and then become a Chunin a year later. However, his success came at a great loss; his father, once well respected in the village, fell into disgrace after choosing to save his comrades rather than complete a mission, causing Konohagakure to suffer in the war effort. Dishonored, Sakumo committed suicide after deep depression and a drop in his skills, which caused Kakashi to lead his life strictly by the ninja code.
Kakashi was teamed with Obito Uchiha and Rin under the leadership of Minato Namikaze. Kakashi's relationship with Obito and Rin was very much similar to that of Sasuke's relationship with Naruto and Sakura respectively as he was the indifferent genius who shared a complicated relationship with his teammates that later developed into a close friendship.
Obito's death had a huge impact on Kakashi's personality. At the start of the series, Kakashi was characterized as carefree and laid back. He rarely shows any excitement towards anything in his daily life. Even when he gave Team 7 their final exam, he showed more interest in his book than how each of his potential students performed. Like Shino Aburame, Kakashi has a rather solitary and matter-of-fact attitude. His calm and detached demeanor has been called “cool, hip, and trendy” many times by Might Guy. Despite his increasingly growing reputation and prowess as a ninja, Kakashi shows no arrogance; rather is very modest about his abilities. His naturally calm attitude is used to his advantage in battle as it is easier for him to maintain his composure to stay focused on the situation at hand and ultimately notice everything around him. Through this, he can make keen and thought-out decisions allowing him to stay steps ahead of his opponents.
Kakashi is a fan of the Make-Out series of novels. He is typically seen reading one of the books when not involved in a fight, making it the only of one (of his reportedly many) hobbies that is ever seen in the series. Despite his fondness for the books, he grows uncomfortable when reading passages to others, presumably embarrassed by the adult content. Naruto has on one occasion used these books against Kakashi, threatening to spoil the ending of the latest installment to force Kakashi to let down his guard (by shutting his eyes and ears) to prevent learning about the ending.
Despite his nature in everyday life, he has shown to be a very responsible and dedicated man when it matters. As he learned from Obito, Kakashi knows what it means to have devotion to what is important in life; people he cares for. He does everything in his power to protect his village and allies. Even his signature jutsu, the Lightning Blade, was made on the principle of duty and perfected on the principle of protecting loved ones. He places their safety over the successful completion of a mission. Kakashi used this belief when deciding whether or not to take on a Genin team, requiring that the Genin work together instead of doing as he told them. He is also regularly late for appointments. This is because of his frequent visits to the memorial where Obito's name is engraved, where he loses track of time.
Kakashi has an ongoing, albeit one-sided, rivalry with Might Guy. In trying to prove himself superior to Kakashi, Guy challenges him to competitions of questionable value ranging from Rock, Paper, Scissors to running races. Guy has a record of 50 wins to 49 loses, which he is particularly proud of. Kakashi shows little interest in their competitions, which only further inspires Guy to defeat Kakashi and his "coolness".
Kakashi's personality is further emphasized by his lazy expression, aloof manner, relaxed voice, and minimalist attitude. He is usually seen in his Leaf Village ninja uniform. Another noticeable feature to Kakashi other than his unique left eye is the thin scar running over it and down to his cheek. He is a tall, fit ninja who has been told he looks just like his father. He is characterized by his spiky silver hair, forehead protector regularly covering his left eye, and his chronically visible mask.He was once misunderstood by Sand's Elder Chiyo, who thought it to be Konoha's White Fang who is his father.
While it has yet to be revealed why, he has since a young age always been seen concealing the lower half of his face. What he looks like remains a point of interest for his students, who try to find out what he looks like in various omake specials in the series. Episode 101, which is devoted to Team 7 trying to remove their sensei's mask, implies that he is in fact quite handsome from Teuchi and Ayame's reaction to seeing his face. In the few instances that he is seen without his mask (though still obstructed by some object) it has been seen that he has a narrow jaw-line.
All these things I hate revoles arond me