Y/N is kiegos 16 year old little sister and they are both heros. They were both bought by the commision when kiego was 6 and y/n was 2 and have been brutally trained, bordering (and many times dipping into) on torturous, ever since. When kiego was 18, he debuted as a hero and quickly rose in popularity. The commision had him play into a 'charming playboy' persona which made him super popular but after a year, when he was 19 and y/n was 15, people's public opinion of him started to dip slightly as they just saw him as a fuckboy. As a response to this, the commision decided to debut a 15 year old y/n as well to add to hawks public persona and make him more lovable as a 'charming playboy whose actually a big softie for his little sister'. They become a hero sibling duo and climb the hero rankings to be at joint 3rd place on the charts. Kiego is now 20 and y/n 16. Y/Ns hero persona is the bubbly, skilled, smart beyond her years, witty and sarcastic younger sister that adores her older brother. One day they meet a 29 year old aizawa in passing during a night patrol. At first its nothing but slowly but surely, aizawa starts to get more and more concerned for the siblings, starts seeing through the cracks in their personas, the broken, abused and desperate kids underneath the masks they held for the public, he sees how lost and lonely they are in tje world and he decides to step in, to be as close to a father figure as possible for these two kids who seem to need someone more than anything in the world