Name : Kuchiki, Byakuya
Rank : Caption of 6th division
Weapon : Senbon Zakura
Weight: 64 kg (141 lbs)
Height: 180 cm (5' 10)
Birthdate: January 31, ????
Family : Rukia, Hisana (decreased)
First appearance : episode 15/16 (anime). Volume 6 Chapter 51 (manga)

In Soul Society, Kuchiki Byakuya is caption of the 6th division in the Gotei 13. He is also head of the noble Kuchiki clan which is one of the four noble families. He shows his nobility by wearing a white headpiece called Kenseikaan; only worn by Kuchiki nobles, and a white scarf called Ginpaku Kazahana no Uzuginu that has been past down from generations to the head of the family. Throughout the Kuchiki's family history, Byakuya is known to be the strongest contender. His first appearance in the anime/manga is when he goes with Renji to retrieve Rukia back to Soul Society.            

At first glance, he seems like a cold hearted and strict person, (which makes people thinks he's an antagonist in the beginning). He does not smile nor show much emotions. His emotionless personality is probably due to the fact that he is noble so he feels superior from everyone else. He believes that it is his responsibility as a noble to be a perfect role model for the rest of the shinigami, therefore his devotion in following the rules are high. There are a view occasions though where he is out of character, such as marrying Hisana and adopting Rukia which he considers an execption

Not much is really known about his past except for the fact that he was married to Hisana and his senpai was Jushiro Ukitake. It is also known that he became Captain about 50 years ago, before the bleach storyline. For training when he was yuonger, he called shunpo tag with Yoruichi.

When he finds out that Rukia (his adopted yuonger sister) was going to to be executed, he had to decide whether to keep a promise he made to his wife to take care of Rukia, or continue to follow the rules which he promise in front of his parents grave. (more informtion about this can be find in the relationship section)

Trivia ;
- Bleach creator Tite Kubo assigned several characters theme songs which are used to give insight to characters that might not normally appear in the run of the manga or anime. Byakuya's theme is Je Chante Pour Passer le Temps, a piano piece, by Giovanni Mirabassi. This Title is French, meaning "I sing to pass the Time".
- He likes Chinese bellflowers (?? kikyo), nighttime walks, and spicy food.
- In an omake chapter Tite Kubo said that a white PSP would suit Byakuya.
Trivia source by wikipedia