Ashura
About
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 Taishaku-ten has almost everyone with whom he has associated killed. Feeling guilty for their deaths, he vows to become strong enough to defeat Taishaku-ten himself.
However, Ashura has another side: He is, in fact, the "true Ashura", the merciless god of war whose wish is the total destruction of Heaven, Earth and Hell. This side was suppressed by several seals, one of which is the distribution of his true power among the Six Stars, but is freed upon their meeting. Only his love for Yasha-ou, his adoptive father, finally triumphs over his lust for destruction.
As a punishment for his father's sin, Ashura was born genderless so he cannot continue the royal line of Ashura, which Ashura-ou so desperately wished to preserve that he tried to defy destiny. Languages which do not have a gender-neutral pronoun usually refer to him by either the male or the female pronoun; the choice of either is often a source of much contention.
(Source: Wikipedia, edited)