Who bit Sasuke's neck?

Orochimaru bit Sasuke's neck during the Chunin Exams.

The Purpose of the Bite: The Cursed Seal of Heaven

The bite inflicted on Sasuke by Orochimaru was not a random act but a deliberate action to implant a powerful and dangerous mark known as the Cursed Seal of Heaven. This seal was intended to grant Sasuke amplified abilities, albeit at a significant cost and under Orochimaru's influence.

How the Cursed Seal is Applied

The application of a cursed seal is a precise and often brutal process. It involves Orochimaru directly biting the recipient's neck. Upon the bite, the distinct cursed seal begins to appear near the puncture wound. This procedure is intense enough to typically render the recipient unconscious, as their body undergoes a critical phase of either accepting or rejecting the foreign seal. The outcome of this acceptance or rejection determines the seal's activation and its subsequent impact on the individual's power and well-being.

Significance for Sasuke Uchiha

For Sasuke, receiving the Cursed Seal of Heaven marked a turning point in his life. Orochimaru, recognizing Sasuke's immense potential and his burning desire for strength to avenge his clan, used the seal as a lure. It became a powerful tool that Sasuke could draw upon for increased strength and speed, particularly in moments of extreme emotional distress or danger. However, it also came with adverse effects, including physical pain and a heightened susceptibility to Orochimaru's manipulation, ultimately influencing Sasuke's decision to leave Konohagakure in pursuit of greater power.

Key Details of the Cursed Seal Application

This table summarizes the core aspects of the event: