Miyabi Hosorogi persists as a spirit bound to a spider-themed mechanical pencil, a state resulting from a pact with the Corpse God, an otherworldly necromancer residing within Polka Shinoyama's body. This spirit maintains full consciousness and intelligence despite five years passing since physical death, a trait the Corpse God noted as unusually indicative of exceptional tenacity. The pencil, adorned with spider motifs and a white cobweb pattern, serves as Hosorogi's sole physical anchor. In life, Hosorogi served as a high-ranking police officer, rising to Chief of Police while simultaneously working as an Internal Affairs inspector. They pursued a perilous investigation into a mysterious symbol linked to organizational corruption, operating with few trustworthy allies. Tsubaki Iwanome, a colleague from another division, became Hosorogi's sole confidant after recruitment into the case. Hosorogi discreetly passed the symbol to Iwanome via a cigarette pack, instructing them to memorize it before burning the evidence and warning it represented a "one-way ticket to death." Their career earned them nicknames like "delinquent inspector" and "scumbag who exposed scum," reflecting a ruthless approach to exposing corruption. A significant unresolved event involved rescuing Lisa Kuraki, granddaughter of a wealthy industrialist, from kidnappers. The corruption investigation later forced Hosorogi into hiding before their murder at an abandoned building used as a dumping ground, presumed killed by a hired assassin. Lingering attachments to the unresolved case and Lisa Kuraki anchored Hosorogi's spirit to Earth for five years. The Corpse God discovered them beneath the abandoned building and offered a pact, transferring their spirit into Misaki Sakimiya's mechanical pencil. Hosorogi now serves as an autonomous writing tool within the Corpse God's fortunetelling business, a role designed to lend legitimacy to the operation. They act as the primary strategist, redesigning business signage and developing comprehensive operational plans to maximize profitability. Hosorogi exhibits strong enthusiasm for financial gain, visibly delighting in revenue by rolling in cash when the business earns one hundred thousand yen and fantasizing about future earnings despite their non-corporeal state. They receive an equal share of profits alongside human participants. Hosorogi leverages the fortunetelling operation to advance unresolved goals. During Inspector Iwanome's session, they autonomously write a message referencing the symbol from their past investigation, provoking a strong reaction and confirming Iwanome's suspicions of Hosorogi's continued influence. This prompts Iwanome to confront Lisa Kuraki, who deflects the inquiries. Hosorogi later acknowledges their former Internal Affairs role to the Corpse God's allies and confirms their prior association with Iwanome, withholding specific symbol details unless paid one million yen. They actively participate in group discussions about the Shinoyama family's power dynamics and potential threats, demonstrating ongoing strategic thinking. Hosorogi also suggests comparative studies of creatures between Earth and the Corpse God's world, indicating intellectual curiosity beyond immediate preoccupations.