His brother might be shitty but i would love to wait for his own story. He probably wants affection that wasn't given by his parents who gave the affection to the mc. He likes the ml but felt betrayed and the only thing he could think of was fucking up the ml's life since he felt betrayed and played. He might be shitty but he has this spot -> good <- in him. He isprobably the most fragile yet brave character in this story.
Dont fking tell me that Dans granny died. It will be effing twist
I would die, because I feel like he wouldn't know what to do with his life afterwards cause everything he's done for the so long is caring for his grandma.