Physically, she stands approximately 1.55 meters tall with short yellow-green (ochre) hair and turquoise (petrol blue) eyes. Her personality is kind and generally easygoing, though she moves at her own rhythm and colleagues sometimes perceive her as an airhead. Despite this, she exhibits a more mature and somewhat old-fashioned disposition than others in the office, and possesses a noted temper.

Outside her legal duties, Tsunomi is an avid fan of the fictional superhero team "AugeRangers." She engages in cosplay, having dressed as the character "Bambi Red" and expressing interest in a colleague cosplaying as "Bambi Pink" alongside her. Professionally, she collaborates on cases within the wizard court system with colleagues including Cecil Sudo, Natsuna Hotaru, and Mitsuhisa Hachiya.