Responses
Tbh I don't really like the girl. I think Teach could talk some sense into Guwon before but overtime he seemed to be influenced by the girl where at one point he seemed to believe the only way to "save the town" was to make Guwon disappear. Also by "father", I presume you mean Teach's father; it's not 100% certain Guwon actually killed him. I think some ppl are speculating that since Teach's past is shrouded in mystery, the real murderer of his own father might actually be himself?
So if Teach could actually talk some sense into Guwon like this, why didn’t he do it sooner? I personally don’t care if he dies or not. Since the moment he violently beat that father to death with a bat, I wanted him to die too.