She is intelligent and witty, and is intimately knowledgeable of Soul Society and its workings, as she was the former leader of the Stealth Forces and the 2nd division captain.
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 found decidedly humorous.
Much like Kisuke Urahara, Yoruichi tends to avoid battles, preferring to help after a fight is over or even often observing situations from afar, but she will step in if she thinks her side cannot otherwise win.
According to Tite Kubo, the author of Bleach, Yoruichi prefers to drink milk, which fits in with her practice of transforming into a cat, most of the time.
He called her "demon cat", and thought of himself as better than her in spite of her high status and rank; as a result, she was easily able to provoke him with her pranks.
[4] A century prior to the Bleach storyline, she helped Urahara, Tessai, and the Visoreds in their escape from Soul Society and abandoned her high status.
[5] Yoruichi first appears in feline form to deliver a warning to Urahara about the Soul Society moving to capture Rukia Kuchiki.
She leads Ichigo's group into Soul Society when they attempt to save Rukia, and then to Kūkaku Shiba when they were unable to enter through the Seireitei gates.
Though she appears to easily defeat Yammy, it becomes apparent from her injuries afterward that her opponent was stronger than she expected due to his tough skin.
It is unknown if this ability possesses any time limit, but it is unlikely considering she has used it for so long that she is unused to her human form and dislikes wearing clothing (much to Ichigo's chagrin).
Yoruichi also taught Byakuya some techniques of her own creation involving flash steps, including one called utsusemi (空蝉, lit.
However, although she never carries it during the main storyline, it is shown during a flashback when she tells Ichigo about Kisuke Urahara as the previous 12th division captain.
Her ability to transform into a cat allows her to "escape sexual objectification in her animal form", while her "status as a fugitive and outlaw constructs her animalistic body as a site of rebellion against the patriarchical order of the Gotei 13".
However, Cortés Reslie also notes that their relationship, in which Suì Fēng is subservient to Yoruichi both on professional and personal level, "reflects real life global power dynamics between China and Japan".
[9]: 91 Louis Kemner writing for CBR described Yoruichi as Soul Society's "rogue hero", who cares about "doing the right thing, at any cost".