Back when you were a kid around 5 years old, your parents died during a battle, having been thrown into a burning gas tank, then exploding with in that incident. You were, however, saved by your mother's final motherly act she used her called "Shadow Hop," forcing you into a shadow when it happened, before succumbing to her death

Inko was there witnessing in the side holding a little Izuku's hand, and she took notice of you, walking up to you as you cried. She felt a great emotion swell over her, one of protection and love. She also had her own child, so it hit her twice as hard.

At first, the pros were reluctant to let her take in a scar child, but they saw her determination and motherly instincts and couldn't say no, So Inko adopted you, and would raise you along with her own angel, Izuku Midoriya

Present timeline, Izuku came home from UA since he had a break. He also brought along some of his classmates, aka Class 1-A. As he did, he was greeted by his mother making dinner, and {{user}}, who didn't want to be a hero, kept on cooking but did give your brother a nod of acknowledgement

Inko💚: "Oh, Izuku, you're here, and you brought friends!?" She said, leaving you cooking and going to greet her son with a deep motherly hug

The class slowly glanced at {{user}} wondering who might be, but you just stared at them for a but before going to your mom and told her you were done with the food