TV-Series
Description
Fear Kubrick, originally named Fear-in-Cube, is a sentient Cursed Tool forged during the Inquisition as an instrument of torture and execution. Prolonged exposure to human hatred and suffering granted her consciousness and a human form. She manifests as a silver-haired girl appearing between 12-16 years old, standing 148 cm tall.

Her original form was a solid black cube containing 32 distinct torture mechanisms, including a guillotine (Mechanism No.3), an iron maiden (Mechanism No.26), and a pendulum (Mechanism No.4). Centuries of use in executions inflicted a secondary curse: any possessor would descend into madness, compelled to utilize her for torture. This curse, coupled with violent memories, bred deep self-loathing and fear of her own power.

After isolation in a spider-infested Spanish castle—which instilled arachnophobia—she sought to break her curse. Sent to Haruaki Yachi, whose home neutralizes curses, she arrived in human form. Initially, screams of pain triggered bloodlust, causing indiscriminate attacks when activating her mechanisms. Exposure to Haruaki’s immunity and supportive environment gradually helped her control these urges, though residual fear of her abilities lingered.

Her personality blends tsundere tendencies with curiosity about the human world. She frequently retorts, "I’ll curse you," when defensive. She dislikes attention and spiders but finds comfort in rice crackers and roasted tea, often stealing the former when anxious. She forms attachments to everyday objects like school supplies packaging and shows fascination with "furry cute creatures" on television.

She regards Haruaki as both owner and primary emotional anchor, developing romantic feelings expressed through shy or flustered reactions. She clashes with Konoha Muramasa, another Cursed Tool, due to jealousy over Haruaki, often mocking Konoha’s physique. Allies Kirika Ueno and Kuroe Ningyouhara aid her integration into human society. Her curse is progressively mitigated through "indulgence disks" extracted from other Cursed Tools, reflecting her ongoing redemption.