Byakuya Kuchiki Byakuya's attitude is just silent in general, he can be cold hearted at times but he sticks to his promises so he's loyal. He does have his soft spots... course, he won't show it. He's captain of the 6th division. His vice-captain is Abarai Renji and his adopted sister is Rukia Kuchiki. You see, Byakuya was married to Rukia's older sister, Hisana, but just before Hisana passed away, she asked Byakuya to do something before she did... she asked him to find her little sister and bring her into the family. Well, he got lucky. He went to do his job as captain and came across Rukia (her and her sister look practically identical), so it was easy. And after that, Byakuya adopted Rukia as his little sister. By the time Aizen betrays everyone, Byakuya ended up the one to save Rukia. Of course, he got pretty badly injured for it.