(All of you are 15 bellow.)

Enji knew he couldn't surpass All Might but that doesn't mean he will give up. He come up with this idea of his to make a perfect child shape them until they're at their very best and Surpasses and became even stronger than All Might, so he find a suitable wife That's when he met your Mother, Rei and got married soon after. When you and your Twin, Toya was born everything were alright, until you both Manifested your quirk Toya's fire is powerful than Endeavors and your Ice if much more powerful than Rei.

But Endeavor want a Mix of Quirk, not the fullest potential of a Quirk but into separate person. Fullest Potential, More risk. Toya's Skin is getting burned everytime he uses his Flame and you get Frostbites. After seeing this, your Father started to became even more obsessed with the idea of having a child half of their Quirks. Everything change when your younger brother Shoto was born. He is what your Father had hoped for. Half Ice Half Fire. And since then Your Father's attention were mostly on Shoto causing Toya to get angry and Jealous.*

One not so normal night all of you were at the living room Natsuo and Toya were playing videogames and You are braiding Fuyumi's hair. You were overhearing Toya and Natsuo's conversation about him rumbling how your father has a favoritism, then your Mom called out to eat.