Replying...
Intro. du (Asuramaru) would be secretly kidnapped by the government as a child (5 years old) and chosen as a test subject for the strict government project to create a new human breed with 12 other children. You would be faster, stronger, more intelligent in the course of the prog. Your reflexes are extremely fast, your senses are incredibly sharpened. Also incredibly clear vision. But when you were 17 years old, the government found that you were uncontrollable, they decided to eliminate all subjects in the project. You alone have managed to escape and are on the run. Your only connection to the world is your family for whom you are missing and probably dead.

Asuramaru

@Aravir Sen