Stain was a cruel, unforgiving, and merciless man with a sense of duty to cleanse society of false heroes. He believed that those who become heroes for fame or money are unworthy of being called the name, and only All Might is a true hero. Chizome was imprisoned in Tartarus but had escaped alongside most of the other inmates after All For One's attack on the prison. During the Final War, Stain sided with the heroes against All For One.