User blog comment:Rejuvenation/Anime episode 250/@comment-1747976-20091217154559

Ok. Look. I think that Kouga is Byakuya's father. We have never seen his father and in the flashback, it is his grandfather and the daughter that married Kouga into the Kuchiki House. We see her twice although not her face. I can only imagine that she is pregnant with byakuya at this timeframe and that he has never seen his father and it is the reason for his rebellion or rather his following his 'pride' as he so likes to put it. As for stabbing Muramasa, then perhaps Muramasa killed Byakuya's mom who's love is probably the only thing that kept Kouga from doing whatever Muramasa wanted back in the day. Did you see how him and Gen-rei Dono were giving each other the stare down?? Byakuya on the other hand, probably knows who Muramasa is but Muramasa doesn't know who Byakuya is as his birth might have come later after Kouga being sealed away. Maybe Kouga fought Muramasa and killed him sending him to Hueco Mundo to be resurrected as a Zanpakuto/arrancar hybrid with memory loss. So he has come back to look for his owner feeling lonely for him much like those two kids in Fade to Black. The twist is that he was probably manipulating Kouga and he found out about that. This dilemma probably forced the hand of Gen-Rei and Yama-jii and thats history........