Misuzu Asahina descends from a prominent financial family, her aristocratic status preceding enslavement. Her father, involved in the network supplying individuals, delivered her to the mansion's master, abruptly ending her privileged life.

Physically, she has blonde hair extending past her hips, blue eyes, and stands 159 cm tall with measurements of 96 cm (bust), 63 cm (waist), and 91 cm (hips). Her appearance includes genital piercings and nipple piercings, highlighted by attire like crotchless catsuits, latex thigh-high boots, lace garter belt stockings, and maid uniforms.

Initially arrogant and defiant, she struggles to reconcile her high-status past with her brutal reality, demanding release upon arrival. Her specialized training as a "clitoris slave" employs extreme physical and psychological torment, including nipple piercing with connecting chains, clothespin application to her clitoris followed by violent removal, and repeated non-consensual acts.

A surgical modification significantly elongates her clitoris. Subsequent scenes depict others manipulating this altered anatomy through forced stimulation. These experiences culminate in psychological breakdown. She internalizes her enslaved identity, declaring herself the master's slave. Her arc traces from defiant heiress to subjugated participant who intervenes to perform acts on fellow captives when commanded.