Current captain of the 8th Division, she previously served as lieutenant under Shunsui Kyōraku. With a calm and sensitive personality, she is also curious and temperamental. Her appearance includes long black hair, red glasses, and a distinctive uniform. Known for her love of erotic manga and her seriousness in battle, she maintains a reserved attitude yet shows great affection for her comrades. She has a history of loyalty to the Gotei 13 despite her detached demeanor.