Ashura

The protagonist of the series and the last living member of the Ashura clan, Ashura (阿修羅, Ashura?) was born after Taishakuten had killed his father and seized the throne. His mother, Shashi, at the same time gave birth to Taishakuten's son Ten-ō, and tried to kill Ashura, whom she believed must stand in her way to rule Heaven at Taishakuten's side. However, Ashura's powers protected him and enclosed him in a cocoon where he slept undisturbed for three hundred years, until Yasha-ō awoke him.

Upon being freed from his cocoon, Ashura first appears as a baby, but grows rapidly to a child of maybe eight years. At first outgoing and friendly, he soon becomes aware of his cruel destiny, as Taishakuten has almost everyone with whom he has associated killed. Feeling guilty for their deaths, he vows to become strong enough to defeat Taishakuten himself.

(Source: Wikipedia)