Avenger's True Name is Angra Mainyu (アンリマユ, Anrimayu?), originally believed to be the Persian god of darkness himself. In reality, he was no more than an ordinary villager. A human that was freed from the confines of Order by having his name expelled from the Avesta, The Universal Revelation of Inscribed Creation. One day, he was randomly chosen as the "source of all evil in the world" by his village and was tortured and sacrificed in the following rituals. The villagers believed that from the moment humans are born, there is evil in them. Since it was impossible to be freed from malice just through clean, righteous living, the only way to realize the true goodness of human beings was to force "all the evils of the world" onto one person and blame him as the true source of any human evil. If one person embodies all the evils of the world, the rest of the people cannot be evil, no matter what. This was the simple, childlike theory they all invested in.

So they continuously tortured him until he went insane. They captured him, beat him, carved every word that cursed mankind onto his body, forced every sin imaginable upon him, took out bits and pieces of him slowly, defiled his mind with absolute evil, and held him responsible for all of it in the world. They would not allow him to die until he succumbed to old age. He had a curse put on him as a result, one made of the great evil that he was to represent. He was shocked at first at the senselessness of it at all. Eventually he started wondering who it was he should hate. However, Avenger himself only felt anger and hatred towards the world and the people that mercilessly executed him. His forced sacrifice eased the confused minds of his people, which despite being unintentional, qualified him to become a Heroic Spirit.

He only despised mankind of his own accord during the first few years, but after that, the hate became a natural function for him rather than an emotion; hate was the state he was always in, so it was only natural for him to continue hating everything without any other reason. By that time, he forgave and tolerated humanity for whatever sins they may cause while hating them. The world is worth hating. The imbalances were evened out by his hatred, so the people could be absolved of all guilt and live freely. But that kind of "forgiveness" is also the same type that validates any evils that humans may perform.

Yet as the time passed by and he saw many rises and fall of generations, he realized that while he still hated humans for what they did, he still loved the world. Of course, the people that put him up there, his family, his loved ones, the people he hated, died long before he did. The village changed over the generations, expanding, declining; people reviled him, people feared him, people scorned him, and yet they revered him as the sign of their salvation. But he could do nothing but hate, since that was the only thing he could communicate to the world. In the end, he accepted his role for humanity, even if it meant to be the blame for their wrongdoings.

A helpless sacrifice—an ordinary person without any special talent—that transformed into exactly what they wanted, that was determined to be and came to represent all evils of the world. And thus, hated by everyone and losing his self, a hero was born.