Elena Hanakaze, alias Hana, operated as an executioner for the secret police organization Nue in an alternate 1931 Japan. Her public covers were a novelist and a sex worker within Tokyo's red-light district, essential for her covert activities. She possessed long blonde hair, blue eyes, a fair complexion, and a distinctive beauty mark beneath her left eye, often dressing in elegant outfits featuring red and purple accents and red lipstick.

Her personality blended overt femininity and flirtatiousness with pragmatic ruthlessness. She openly expressed distaste for her fellow executioners' reserved demeanors while secretly valuing their companionship. Preferring men and prioritizing financial gain over emotional connections, she lived according to her own desires, exhibiting emotional and selfish traits. As Nue's seduction specialist, she employed deception through appearance changes and role-playing to infiltrate her targets' proximity. In combat, she favored support over direct confrontation, wielding a transformable parasol that functioned as either a whip for disarming opponents or a crossbow for ranged attacks, supplemented by concealed items like hairpins for close-quarters assassination.

Elena was recruited into Nue after discovering her pregnancy, though the circumstances remained undisclosed. Her missions included protecting informant Kyoko and pursuing anti-government insurgents. Her pregnancy later led to retirement from active duty as both an executioner and a sex worker. She gave birth to her daughter, Satsuki, in episode 11. Following the overthrow of the Tokugawa Shogunate and the death of her colleague Sawa Yukimura, Elena adopted Sawa's ward, Asahi Nakamura. Years later, she raised both Asahi and Satsuki, embodying a maternal role absent during her earlier life.