Hisana Kuchiki

was Rukia Kuchiki's sister and Byakuya Kuchiki's wife. The fact she strongly resembles Rukia her supposed sibling leads a small number of fans to belive Byakuya and Rukia are actually father and daughter and not sibling at all, this would mean Hisana was truly Rukia's mother. This is mere speculation though since Rukia has not mentioned her family nor as Byakuya so this is just a theory made by fans.

Appearance
Hisana had a very strong resemblance to her younger sister, this could suggest that they may be fraternal twins, Rukia Kuchiki. She was, like Rukia, short and petite with short, black hair and pale skin. Also, her eye color was the same as Rukia's: purple with a hint of blue in them. But the strand of hair in the middle of Hisana's face was shorter, and more frayed at the end. She was also seen smiling more often than Rukia, thus having a more soft-looking face, contrasting to Rukia's hard, most of the time emotionless face.

Personality
Though Hisana was only shown in the series for a short amount of time, she was shown to be a kind woman. She was caring and loving. Hisana was soft-spoken, and didn't speak too often, this is in sharp contrst to Rukia's outspoken and somewhat temperamental nature. Hisana also felt very guilty for leaving Rukia behind to save herself, feeling that she didn't deserve to be called her sister. She loved Rukia greatly, but could not care for the both of them.

Synopsis
She was forced to abandon her baby sister, Rukia, in the 78th district of Rukongai, in order to survive. She sometime thereafter married Byakuya. The people of the Kuchiki clan were against their marriage, as marrying someone of Rukongai seen as the wrong thing to do in the Kuchiki family. Hisana spent every remaining day of her life searching for Rukia. Hisana later died of illness on the Spring of the fifth year, but on her death bed, she asked Byakuya to find Rukia and adopt her into the clan, but not to tell her she was related to her, as she considered herself unworthy to be her sister. Also, on her death bed she said that the last five years she spent with Byakuya passed like a wonderful dream. Hisana's portrait also appeared in the movie Bleach: Fade to Black. Byakuya was staring at her portrait, and told Ichigo Kurosaki where Hisana once lived so he could find Rukia. It should be noted that Byakuya did not know who Rukia was during this time, only learning (from Ichigo) that Hisana was her sister.