|Affiliation||Gotei 13, Soul Society|
|Position||Lieutenant of the 13th Division|
|Base of Operations||13th Division HQ & Kuchiki Manor, Soul Society|
|Relatives||Hisana Kuchiki (sister, deceased)|
Byakuya Kuchiki (brother-in-law/adoptive brother)
|Shikai||Sode no Shirayuki|
Short and petite, Rukia has light skin and violet-colored eyes. Her hair is black, with several strands of hair always hanging between her eyes. As a Shinigami of the Gotei 13, Rukia wears a standard Shihakusho. She wears a fingerless white tekkou, similar to Byakuya's, which extend above her elbows. As a lieutenant, she wears her Division Badge around her uniform's left sleeve, which has been shortened to just reach her upper arm.
Initially born into a lower class, Rukia retains her modesty, even as an adopted member of the nobility. She is graceful and "clean", yet chooses to talk to ordinary people. However, her cool and lone demeanor often forces her to hide her personal troubles, even from her friends. According to Ukitake, Rukia never opens up her heart, and has difficulty making friends.Rukia is clueless about the ways of the modern Human World.
She is very good at acting, having acted her way through a number of tough situations, such as getting out of trouble with school teachers and convincing the Kurosakis to let her stay at their house. Rukia always has trouble finding clothes that fit her, especially when inhabiting a Gigai in the Human World, leading to her stealing clothes from Ichigo's sister, Yuzu. She likes to climb to high places. Rukia likes everything rabbit-themed, and becomes quite sensitive when someone insults her obsession with rabbits. People often have difficulty understanding her drawings, which are typically rabbit-like, and doesn't like it when people complain about their quality. Rukia's favorite foods are cucumber, eggs, and rice dumplings.
Rukia lived in the outer districts of the Rukongai, which were a living hell. She was ultimately found and rescued by Byakuya Kuchiki as per the dying wish of her older sister, Hisana, who was Byakuya's wife. Byakuya adopted her as his sister, despite the protests of his family. She enrolled in the Shin'o Academy, and later joined the Gotei 13, becoming a seated officer in the 13th Division under the benevolent Jushiro Ukitake.
During one trip to the human world, she met a spiritually aware human named Ichigo Kurosaki and transferred her powers to him so he could save his family from a Hollow, a capital crime. Sometime later, Byakuya and his lieutenant Renji Abarai, Rukia's childhood friend, came and retrieved her. Rukia was taken back to Soul Society, where she faced execution for her "crime". The execution was stopped at the last moment by Ichigo with Renji's help, and Rukia was saved.
However, Sosuke Aizen came forward and, after overpowering Ichigo and Renji, brutally removed the Hogyoku from Rukia's chest, but was stopped from killing her by Byakuya. Aizen escaped with his cohorts, and the charges against Rukia were dropped and her powers and status were restored.