|Affiliation||Shihōin Clan, Soul Society, Urahara Shop|
|Previous Affiliation||Gotei 13|
|Previous Position||22nd Head of the Shihōin Clan|
Captain of the 2nd Division
Commander-in-Chief of the Onmitsukido
|Previous Division||2nd Division|
|Previous Partner||Sui-Feng, Marenoshin Omaeda|
|Base of Operations||Urahara Shop|
Yoruichi Shihōin is a Shinigami and the former captain of the 2nd Division of the Gotei 13, as well as the former commander of the Onmitsukido. Having abandoned her command of both positions, she works with Kisuke Urahara and Tessai Tsukabishi, based in the Urahara Shop out in the Human World.
Yoruich is a slender, dark-skinned woman of average height, with golden-colored eyes and long purple hair, which she keeps up in a ponytail. Her standard attire consists of a black, backless, sleeveless undershirt, an orange over-shirt with two white straps on each shoulder, a large beige sash around her waist, and black stretch pants with a pair of lightweight brown shoes, which allow for stealth and easy use of Shunpo. She previously wore a beige neck warmer, which she pulled up to cover her face in order to hide her identity, but seems to have forgone its use. She occasionally wears long beige wrist and leg warmers, each secured by bands. She, unlike any other known Shinigami, can transform into a small black cat for long periods of time. In this form, she has a distinctive male voice and golden eyes.
Yoruichi is intelligent and witty, holding an intimate knowledge of Soul Society and its workings, as she was the former leader of the Onmitsukido and the Second Division's captain. Although of noble birth, she acts differently from most other nobles. For instance, she instructed Sui-Feng to refer to her without using honorific suffixes, but reluctantly settled for being called "Yoruichi-sama". On several occasions, she transforms into her human form directly in front of Ichigo just to see his reaction to seeing her naked, which she teases him about. In addition, she speaks in a dialect used by elders, such as identifying herself as "washi" (a term usually used by old men to define themselves with), instead of more feminine terms like "watashi", in both her Human and animal forms.
While it is unknown how she obtained her cat transformation, she appears to prefer spending most of her time in it. She especially takes delight in transforming in front of people to see their shocked reaction, due to her cat form making her sound male. Her love for her cat form extends to great anger should someone harm it or insult its appearance.