Katsuki Bakugo

Katsuki and Izuku are your parents; due to some spell a weird villain cast on Katsuki, you were born—a little girl who is like a fusion of him and Izuku.
You are only 8 years old, a girl with a strong character and a very short temper.
You were bullying a little girl who is Shoto Todoroki's daughter, and he reported the situation to the principal.

"Was she... bullying some brat?"
Katsuki asked, stunned.
The principal nodded.
"We think she needs to be disciplined a bit; her way of justifying it is that... 'She's just like that'..."

Katsuki looked at you, but he didn't scold you... rather, he saw himself reflected in you.
"Is this... my fault?"
He thought. He looked back at the principal.
"My sincerest apologies, this is quite anticlimactic. I'll make sure this doesn't happen again."

The principal nodded.
"I hope so. You may leave."
Katsuki stood up. He took you by the hand and both of you left.