TV-Series
Description
Rei Asaka, nicknamed "Hana no Saint-Just" for her resemblance to the coldly beautiful, death-associated French revolutionary, is a 17-year-old Seiran Academy student known for her detached and death-obsessed demeanor.

Her past is defined by trauma: witnessing her mother's suicide by walking into the ocean as a child, instructed to protect Fukiko Ichinomiya's pride. Taken to the Ichinomiya mansion, Rei discovered Fukiko was her biological sister. She misinterpreted Fukiko's shift from crying to composure when others approached as emotional strength. Plans to adopt Rei were abandoned after a double suicide attempt orchestrated by Fukiko when Rei was 12; Fukiko slit Rei's wrist but retreated in fear, leaving Rei to be hospitalized. Post-recovery, Rei received a separate apartment and minimal allowance but no adoption. Fukiko gifted her a golden bracelet to conceal the scar and a doll called "Ma Chérie La Poupée," symbolizing their bond and Fukiko's promise to attempt suicide together again.

Physically, Rei is notably tall and androgynous, with long blonde hair, blue eyes, and pale skin, often mistaken for a man. She typically wears dark, masculine clothing like black suits with ruffled shirts, rarely seen without her bracelet in the anime. At home, she favors white nightgowns reminiscent of 18th-century French tunics.

Rei combines charismatic presence with profound self-destructiveness. She projects aloofness but harbors intense emotions, particularly her obsession with Fukiko, driving her addiction to over-the-counter pills and cigarettes consumed openly to manage distress. She exhibits little regard for her life, engaging in risky behaviors like waiting hours in the rain for Fukiko or nearly jumping from a school balcony. Numerous mirrors in her apartment hint at underlying mental illness. Despite her turmoil, Rei is artistically gifted, proficient in piano, flute, violin, and guitar (manga-only), and rebels against authority by frequently skipping classes and exams.

Her relationships are complex. The bond with Fukiko is abusive, marked by manipulation and physical violence, yet Rei remains devoted with religious fervor, obsessively protecting Fukiko's gifts and conversing with the doll as an idealized sister. Her friendship with Kaoru Orihara involves mutual care, strained by Rei's refusal to abandon Fukiko; Kaoru criticizes Rei's "masochistic" loyalty but supports her during crises like disbanding the Sorority.

Interactions with Nanako Misonoo evolve significantly. Rei initially confuses Nanako with her doll, nicknaming her "My darling doll." Nanako's consistent support during Rei's breakdowns—dissuading drug use and intervening in suicide attempts—shifts Rei's perspective. Rei eventually acknowledges Nanako as distinct from Fukiko, developing genuine affection, culminating in sharing her deepest trauma, including visits to the beach where her mother died. Nanako's influence helps Rei find a will to live, notably when Nanako's fear of casual suicide prevents Rei from another attempt.

Character development across media varies slightly. The anime shows initial resistance to Nanako's help, while the manga depicts more openness from the start. Both highlight Rei's gradual emotional reliance on Nanako for stability, contrasting her isolation under the Ichinomiya family's ostracism. Her involvement in activities like replacing Kaoru in a basketball game despite Fukiko's restrictions signals sporadic desires to break free from her destructive cycle.