honestly at first i was confused on their past but i can definitely see where the sister is coming from n why she views her brother in that way, our mother dies then you start despising me, ignore me then starts to randomly control me?! i can imagine how little she feels. n the older brother he haves it bad everything that happened i feel horrible but maybe i missed something but his mother death haves NOTHING to do with the mc and this might sound crazy but i think the brother is kinda almost just making stuff hard for himself and being a bit stuck up like sasuke