Neji Hyuga Byakugan

Neji Hyuga (Hyuga Neji) is a branch member of the famed Hyuga clan. Throughout Part I, Neji is widely considered to be the most talented Genin in Konohagakure. He is a natural genius, surpassing those of the main branch, which he bitterly resented. When Neji is first introduced, he has an air of superiority about him, strongly believing that everyone is resigned to their fate and that strength is pre-determined.
After the Preliminaries of the Chunin Exams, he learned in the period of one month Eight Trigrams Palms Heavenly Spin, a technique where one ejects chakra out of all 361 of their chakra points and spins like a top, creating a barrier of impenetrable chakra around ones body.
However, after battling with Naruto Uzumaki, Neji finally changes his outlook on the world.Neji has a large knowledge of his Byakugan, a bloodline limit Kekkei Genkai that allows its user to have an unobstructed view of the world around him (an almost 360 degree vision with in part 1 a 50m radius and in part 2 a 1000m radius). It can see through any solid object and can see the chakra points of a person, and using his Gentle Fist, a style that pushes chakra out of ones hand, can effectively control the flow of chakra within an foe.

Abilities

  As a member of the Hyuga clan, Neji possesses the Byakugan, which gives him an almost 360-degree field of vision, save for a small blindspot at the back of the neck. Neji is acutely aware of his blind spot and takes extra caution in keeping it away from opponents as well as paying close attention to it.
While the Byakugan naturally has only a 50 meter field of vision, Neji is able to increase the range of its sight several times over by the start of Part II, to around 1000 meters.

Background
 
After seeing his father being punished for merely thinking about harming Hinata, Neji began to see himself as a helpless "caged bird," forced to obey the main branch of the family. Around this time, his father had begun to see Neji's natural talent. After his father's sacrificed himself for the main family, Neji mistakenly believed that the main branch had forced him to do so, and the event became the primary basis of his grudge against the main branch.

Neji's Byakugan also allows him to specialize in the Gentle Fist fighting style, which enables him to damage an opponent's chakra circulatory system and inner organs directly with even a slight tap. Neji also uses this technique to attack his opponents heart directly and send them into cardiac arrest resulting in the death of the opponent with but a single strike. His strength and brutality in this area are such that three jonin Jonin—Might Guy, Kakashi Hatake, and Kurenai Yuhi— in addition to exam proctor Hayate, felt the need to intervene when he was on the verge of killing Hinata during the Chunin exams.