Kūkaku is a youthful-looking woman of average height. She has green eyes and wears bandages over her long messy black hair that parts down in half at the small of her back. She wears a white skirt and provocative red robe exposing her ample bosom. She is missing her right arm and has a tattoo on her left arm. She wears bandages around her right shoulder and both ankles. She also has wooden sandals and a cloak.
Kūkaku is violent, temperamental, and very aggressive, often scolding and beating those who annoy her. Kūkaku has been known to change the location and design of her house without warning. While the actual design changes, the theme is consistent and the houses are recognizable from a single glance. Yoruichi notes that she prefers to live away from built up areas, where it is quieter.
Kūkaku smokes using a pipe. Additionally, she is respectful of her deceased brother's memory.
- In the anime, the three guardians Aizen has summoned to Sōkyoku hill weren't shown. Instead, Kūkaku Shiba arrived with Jidanbō Ikkanzaka, and used Raikohō to attack Aizen, before he was subdued by Yoruichi and Suì Feng.
Ichigo Kurosaki • Orihime Inoue • Uryū Ishida • Yasutora Sado • Isshin Kurosaki • Masaki Kurosaki† • Yuzu Kurosaki • Karin Kurosaki • Kon • Ryūken Ishida • Kanae Katagiri† • Tatsuki Arisawa • Kisuke Urahara • Yoruichi Shihōin • Kazui Kurosaki
Genryūsai Shigekuni Yamamoto† • Shunsui Kyoraku • Nanao Ise • Suì-Fēng • Yoruichi Shihōin‡ • Rōjūrō Ōtoribashi • Izuru Kira • Retsu Unohana† • Isane Kotetsu • Hanatarō Yamada • Shinji Hirako • Momo Hinamori • Byakuya Kuchiki • Renji Abarai • Sajin Komamura‡ • Tetsuzaemon Iba • Lisa Yadōmaru • Kensei Muguruma • Shūhei Hisagi • Mashiro Kuna • Tōshirō Hitsugaya • Rangiku Matsumoto • Isshin Shiba‡ • Kenpachi Zaraki • Yachiru Kusajishi‡ • Yumichika Ayasegawa • Nemu Kurotsuchi† • Akon • Kisuke Urahara‡ • Jūshirō Ukitake† • Kaien Shiba† • Rukia Kuchiki