Kuroe Ningyōhara, a Japanese doll forged as a Cursed Tool, once existed to siphon life energy by severing her owners’ hair during sleep, a process culminating in their demise. Her porcelain form bears long ebony tresses and an impassive expression, though faint emotional nuances surface for those who observe closely. Her hair functions as a malleable instrument, executing tasks from serving tea to combat maneuvers—entangling foes, erecting defensive shields, or unleashing named techniques: "Chaotic Tadamori" conjures explosive orbs of light, "Cushioning Munemori" fortifies barriers, "Killing Machine Masakado" paralyzes targets, and "Satisfied" accelerates cellular repair for healing.

Freed from her curse, she sustains herself at Dannoura Beauty Parlor, a salon where she channels lingering vitality from clients’ trimmed hair—a ritual she relishes. Community appreciation and the salon’s success, fueled by her unmatched hairstyling artistry and youthful allure, particularly among male patrons, catalyzed her full liberation.

Tied to Haruaki Yachi’s lineage through his father’s cursed artifact collection, she later reenters his life, inadvertently inviting conflict when Alice Bivorio Basskreigh attempts to conscript her for familial schemes. Kuroe allies with Haruaki’s circle to thwart such threats. Her dynamic with the group blends strategic aid in battles and mischievous flirtations toward Haruaki, oscillating between teasing and sincerity.

She forges a kinship with Sovereignty, a fellow reformed doll, their bond rooted in shared redemption. Initially clashing with Fear Kubrick over territorial misunderstandings, she gradually assimilates into the collective, balancing camaraderie with tactical prowess.

Her routine embraces serenity, favoring leisurely baths despite their enfeebling warmth—a vulnerability contrasting her latent combat prowess. This duality defines her existence: a once-malignant entity navigating harmony between her lethal origins and hard-won humanity.