Todoroki's
This one specifically applies to Shoto Himself, but it could work with his brother Touya/Dabi (We're going to pretend that he is not dead.)
It specifically has to do with his hair, you know. how one side is red, and the other side is white. OK, so we all know how Dabi's Went from red to white over a little bit of time.
I'm imagining that the older that Shoto gets, the more his hair kind of blends
So, at one point in his life, Let's say early 30s it would be kind of swirling at the top of his hand. And then he gets to his 40s and it's got some white on the side that is supposed to be red and red on the side that is supposed to be white. And then he gets into his later years, and his head would be just full on a perfect blend of pink. For the more noticeable part of it.
And then for Dabi as I stated before. We all know how his hair went from red to white. I feel like it would have an everlasting cycle of that throughout his life from red to white, then back to red, back to white. And then around the end of his life, his later years, he'd have. pink color too. But his would always be fluctuating in different shades.
It could be bubblegum pink one day and the Next week it will be. hot pink. For example, and you wouldn't even notice unless you like took a photo, or you haven't seen that person for a while because it's slow in its process of doing it.
Because that would be really awesome and I just. love that idea.