Satsu Takega, known as Sat-chan, is an 18-year-old figure central to the narrative. She possesses grey hair styled in twintails secured with ribbons and brown eyes, frequently appearing in her school uniform: a grey sailor collar top with long sleeves and a matching pleated grey skirt. Her past connects directly to the protagonist, Akuji, through an arranged marriage requested by his grandfather, Ippatsu Yamamoto; this ceremony ended abruptly when the Momoyama clan attacked, triggering a confrontation. Satsu demonstrates notable combat proficiency, favoring a rocket launcher as her weapon of choice. She can face challenges, however, against strong opponents like "The First Night." Her relationship with Akuji extends beyond battle, defined by her active pursuit of his approval and happiness. This drive led her to wear a "nude apron" to please him, resulting in Akuji caressing her previously untouched body. Her character receives dedicated focus in "Sat-chan's Story," identified as Episode 7. Functioning as Akuji's partner, Satsu collaborates with him on their shared objective: challenging the female-dominated power structure governing Osaka, a matriarchal system that solidified during Akuji's imprisonment. Their resistance involves coordinated efforts against this established order.