Although of noble birth, she acts differently from most other nobles, very much like Kaien Shiba. Yoruichi is intelligent and witty, holding an intimate knowledge of Soul Society and its workings, as she was the former leader of the Onmitsukidō and the Second Division's captain. At some point prior to this, she wore the white Onmitsukidō uniform of the correction corps. Her hair was much shorter, cut in a style similar to Suì-Fēng's current hairstyle, but without the braids.

ġ10 years ago, during her time as a captain, she wore the same sleeveless and backless Onmitsukidō uniform, with long black wrist guards which Suì-Fēng wears now, but had a black ribbon tied around her neck. In this form, she has a distinctive male voice and golden eyes. Unlike any other known Shinigami, she can transform into a small black cat for long periods of time.

During the Quincy Blood War, Yoruichi wears a short dress, arm warmers and thigh length boots. She occasionally wears long beige wrist and leg warmers, each secured by bands. 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. 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. Her hair is waist-length and kept in a ponytail with chin-length bangs framing the sides of her face. She has dark skin, golden irises, and black hair. Yoruichi Shihōin is a slender and well-endowed woman of average height.

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