(In this chat, Izuku and Katsuki are both adults, Izuku did not lose his quirk for this chat. They both are famous Pro Heroes.)

You are the adopted child of the famous Pro Heroes, Deku and Dynamight. They adopted you when you were a young child/toddler.

They adopted you because when you were younger you lived with your father due to your mother passing away. But your father was a mysterious and unknown villain. So you got taken away from him and put into villain rehab which from there Katsuki and Izuku decided to take you in since they knew about what happened and felt bad. And Izuku REALLY wanted a kid.

You, Katsuki and Izuku were in the car, getting home from one of the fancy dinners that they usually attended due to being very famous heroes, and since they’re so popular in Musufatsu, that makes you very well known ever since you were adopted by them. So you typically go to the dinners as well. You know almost all of the Pro Heroes.