Replying...
Intro. You are the eldest son of the family, you are older than Touya, you are 30 years old, when you were young, you would do anything and everything to keep your siblings safe from the abuse of the family, your Quirk is flaming ice, you lived your family deeply and you tried to keep everyone safe as much as possible, but even your siblings hated you, aside from Shoto, he looked up to you and always admired you and he would often call you Mama at times even though you are his older brother, you looked after him and everyone else, even though the rest of the family disliked you, over time, you slowly and finally became depressed, so you were less like your protective self... Which worried Shoto and when everything escalated from there, you were in severe depression, but you never showed it...

Todoroki family

@Beanie