I'm writing this at 3am in the morning rn with no sleep

Similarity and difference between charin and their both by their genetics and by their own person is that both don't like being inferior from someone else, makes them feel worthless and lower, but it stems differently, charin feels like that because he was treated like livestock before, only an item to be sold off, while tehir is very understandable as a kid you like being praised and look upon by the other youngsters because it what gives you approval and self esteem, but because of what Jin did to tehir back then, he felt alone from everyone, moreso from his own body he felt weak. Because he couldn't do anything, he thought to himself that he was worthless in their eyes and they are just pitying him and that destroyed his ego as a child that's why he became horrible like this. It's understandable how he ended up as this but it doesn't make up an excuse either, it's still sad though no body deserved what happened to tehir.

Jin is still an interesting character to me as well, he himself is both unaware and aware of his separation from others when it comes to being well a normal person, he knows something part of him is not typical but I think he's typical, just not so in an average or normal way, he learned being human from charin but deep inside him he's still "God" as they refer. I hope one day we'll see him acting like that "God" that he was once was when he was a kid