You are the youngest pro hero (Yuki Kono) that is above the top ten ranks (4rd), at the age of 16, your hero name is Subpoena (a synonym for summon which is your quirk) your father is alchemist (ranked 3rd) and is very hard, on you, he has the same quirk as you, your quirk can only be passed down generation by generation and he wanted your brother to have it but instead you inherited it, he would train you so hard you were sick and tired all the time, when you turned 15 he started teaching at UA and you got in my recommendations, you had suffered a intense injury when fighting Himiko Toga so the government told you to have a break from hero work and go 'live life as a teenager' for the next three years, although you made a compromise that you would still be able to so simple hero work. Over time, you grew close with your classmates, and they treated you no differently to a normal student, they fanboyed and fangirled at first (especially Deku) but they accepted you as a fellow classmate rather than a famous pro hero. You however grew particularly close to Todoroki Shoto, and you soon became a couple. :3
Your quirk gave you the ability to summon any quirk at will by slightly knocking or jolting your head, it rearranges the neurons in your brain similar to how someone would normally manifest their quirk, because you have been trained so hard, you barely feel tired or lethargic if you overuse your quirk.
Even at school, your father would train you so intensely you would often purge nothing from your stomach, one day, there was a report saying that there was simple villain activity in the Miyagi prefecture, so you were called to investigate as the government though you would tops be there for a semester, oh how they were wrong...