Yoruichi Shihouin

Yoruichi Shihōin (四楓院 夜一, Shihōin Yoruichi) is the former captain of the 2nd Division of the Gotei 13, as well as the former commander of the Onmitsukidō. Having abandoned her command of both, she works with Kisuke Urahara and Tessai Tsukabishi, based out of the Urahara Shop in the Human World.

Yoruichi Shihōin is a slender and 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 backless, black 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 colored shoes, allowing 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 also occasionally wears long beige wrist and leg warmers, each secured by bands. She, unlike any known Shinigami, is able to transform into a small black cat for long periods of time. In this form, she has a distinctive male voice and golden eyes.
110 years ago when she was a captain, she wore the same sleeveless and backless Onmitsukidō uniform, with long black wrist guards that Suì-Fēng wears now, but had a black ribbon tied around her neck. She also wore a long-sleeved captain's haori. Her hair was also much shorter and cut in a style similar to Suì-Fēng's current hair-style but without the braids. At some point prior to this she wore the white Onmitsukidō uniform of the correction corps.

Yoruichi is intelligent and witty, holding an intimate knowledge of the Soul Society and its workings, as she was the former leader of the Onmitsukidō and the Second Division's captain. Although of noble birth, she acts differently from most other nobles, very much like Kaien Shiba. For instance, she instructed Suì-Fēng to refer to her without using honorific suffixes, but reluctantly settled for being called "Yoruichi-sama" ("Lady Yoruichi" in the dub). She also transforms into her human form directly in front of Ichigo on several occasions just to see his reaction to seeing her naked, which she even teases him about. Another note of her eccentricity is that she speaks in a dialect that elders use, such as identifying herself as "washi" (a term that usually old men define themselves with) instead of more feminine terms like "watashi" in both her human and animal forms.

While unknown how she obtained her cat transformation, she appears to prefer spending most of her time in it as upon showing her Shinigami form to Ichigo, she forgot to put on clothes as she grew use to not needing them. She especially takes delight in transforming in front of people to see their shocked reaction due to her cat form giving the appearance that she is male. Her love for her cat form extends to even great anger should someone harm it or insult is appearance as seen from how upset she got after her tail was damaged.

Although relatively calm and mature when a situation calls for it, Yoruichi is quite laid-back and playful, often teasing or flirting with those younger than her, such as Ichigo Kurosaki at the underground hot spring, a younger and hot-headed Byakuya Kuchiki, Suì-Fēng before her time as a captain and Kisuke Urahara, childhood friend, former underling and fellow ex-captain. Yoruichi prefers to drink milk, which fits with her practice of transforming into a cat.


 Info from :  http://bleach.wikia.com/