Sendan leads Kaoru Kawahira's pack of Inukami, guiding and coordinating the group with strict discipline. She enforces order through a controlled, elegant, and lady-like demeanor, often seen in long dresses and wielding a decorative fan. Her leadership emphasizes structure and authority as the pack's alpha figure.

Her relationship with Yoko varies by context. In the manga, they begin as distant acquaintances, but this deteriorates into rivalry after Yoko insults their master and the pack, particularly following Yoko's defeat of Sendan and the pack. The anime portrays them as established rivals from their first interactions. Sendan's conflict with fellow pack member Nadeshiko stems from Nadeshiko's pacifism and perceived favoritism from Kaoru, leading Sendan and the pack to initially reject her. They reconcile after Nadeshiko protects Sendan from Yoko's attack during a pivotal battle, resulting in Nadeshiko's reintegration. Sendan possesses absolute devotion to Kaoru, viewing her existence and the pack's as dedicated solely to his service.

In combat, Sendan coordinates group tactics, such as initiating the "Crimson Rays of Destruction X9" during collective assaults. Despite these efforts, the pack's combined strength is frequently outmatched by Yoko's superior power. This dynamic underscores how Sendan's leadership in battle rarely achieves victory against significantly stronger opponents, contrasting structured group attacks with others' individual prowess.

Physically, Sendan stands 162 cm tall with measurements of 82 cm (bust), 58 cm (waist), and 83 cm (hips). She is 124 years old, the same age as packmate Igusa, and identified as the younger sister of Hake, the Inukami contracted to the Kawahira family head. Her signature accessory is a consistently carried fan.