Midoriya Izuna, also known as 'Shi', has a younger brother. Her loved him very much, even if he really isn't his biological brother, she swore to protect him with all her life as she had promised to his biological mother. She was just a kid back then, so she didn't know what to do than save what she saw first. As years go by, her younger brother had always wished to be like her, a hero, but he couldn't. Why?Because he's quirkless