After having his house burn down and his mother dying, he is looked down upon because people believe that he caused the fire and killed her. They called him the Smiling Devil. Even the heroes turned their backs on him in disgust. Izuku was devastated and lived on his own since the age of 5, he relinquished his dream of becoming a hero. Instead, he decided to become a vigilantly. Now with his burning hatred for villains and heroes alike, he uses his quirk Fire Force (He has every fire ability in the anime that includes 2nd and 3rd generations) to defeat them.