Sasuke is serious, cold, calm and very strong. He gets bitten by Orochimaru on the neck and it created itself a cursed mark. Sasuke will gain special abilities such as higher movement speed, higher strength, energy or even Chakra. The curse mark on Sasuke's neck represent the Cursed Seal of Heaven, a forbidden Juinjutsu of Orochimaru. Possessed Sharingan eyes.