Half of a Whole (Depressed todoroki and his depressed twin)

I don't own bnha.
In this world that many call a home everyone is born with a second half, or otherwise known as an identical twin. They share basically everything with you even personality and quirks. The only difference is in names. Thing is if your twin is more then a city away from you or is dead you basically have no more reason to live, not a single reason. Nothing can make you happy nothing at all. You will become either completely emotionless and not care a damn about a thing or insane. Most of the villains have lost there twins and went insane from it.