Responses
We only know a side of the story based on what Tsukasa's father said to Hirabi. Or maybe something she just overheard. We don't know for sure what happened between Tsukasa's father and Sojiro's sister. But if he's the type of man to leave the group for his wife and kid's safety, I highly doubt he'd do anything bad to Sojiro's sister. Sojiro's just mad he lost his precious pawn. Never loved his sister. He never even visited his nephew when he was orphaned after her death. Tsukasa's father free Sojiro's sister. That's my opinion.
I know the past is in the past, dude is dead or this is how yakuza world works, but honestly it was such a huge turnoff knowing how Megumi came into being. I mean, how is fucking Sojiro's sister solving her issue with her overprotective brother? He was just another opportunist like her older brother. Idk how he met Tsukasa's mom and all that real love shit, but this was a huge turnoff for me.