Akaguro, Chizome

赤黒血染

All Might's debut as a Hero deeply inspired Chizome. From that point on, Chizome aimed to become a Hero like All Might. He enrolled in a private Hero course high school to train for this goal. However, Chizome fell into hopelessness and despair after witnessing the school's "fundamental decay"; the students there were becoming Heroes for money and personal gain. Disillusioned by the reality of Heroics, Chizome dropped out during the summer of his freshman year.
After leaving high school, the teenage Chizome preached an ideology he called the "Revival of Heroics" through street oratory and soapbox speeches. However, no one listened to him.
Over the following decade, Chizome realized that only action would create his ideal world and improve Heroics; he researched and disciplined himself in the killing arts through self-study to fulfill his duty of "Revival of Heroics". During this decade, Chizome's parents died (the cause of their deaths is unknown, but it is believed that Chizome was not involved).
After completing his training in the killing arts, Chizome took up the mantle of Hero Killer Stain and began advocating the "Revival of Heroics". In this ideology, Chizome (now known as Stain) stated the guidelines for being a Hero: Heroes must not desire rewards or compensation, and people can only hold the title of Hero when they commit ultimate acts of self-sacrifice. The ideology claimed that the "Heroes" of the modern world are fakes who pretend to be Heroes.
Stain then began implementing his "Revival of Heroics" by killing Pro Heroes, deciding that he would not stop his purge of Pro Heroes until the world realized the flaw in the Heroics system. Stain's end goal in implementing his ideology "Revival of Heroics" was to create a just world filled with true Heroes.