Ehh they haven’t revealed anything more than we don’t know. We always knew since the beginning that he was a psycho. Originally he was just gonna let teach die. Not because he’s sinister but because he is practically a child, mature, but still unaware of how the world works and distinguishing right from wrong. I think whoever raised/created him is the real villain because he never taught him real compassion. He only understands surface level of most things. Doesn’t understand the weight of his own words. The only real mystery is what he actually feels for teach and his creator. I bet he is only fascinated by teach and at the moment only lusts for him but does have some admiration for him. The toxic red flag appearance is just a troll and I bet he’s still gonna be soft in the end.
why was this fleshed out horribly... like I get it but this was such a lame way to execute it