The Author is an unnamed writer who gained fame following the publication of his book about strange houses. He receives numerous submissions from readers detailing bizarre architectural features and selects 11 unrelated cases to investigate. Driven by professional curiosity, he uses interviews, archival research, and floor plans to seek connections between the properties.

Kurihara is an architectural draftsman who assists the Author in his investigations. He uses his technical background to interpret floor plans and deduce the hidden narratives within structural designs. His insights into the functional and psychological aspects of architecture are essential to solving the overarching mystery.

Yaeko is a tragic woman whose life history involves extreme suffering and the loss of her left arm and right leg. The Rebirth Congregation uses her as their "Living Goddess," reshaping their architectural structures to mirror her mutilated body. She endures immense public humiliation as the cult commodifies her physical trauma for financial gain.

Masahiko is the chairman and former president of Hikura Homes. He acts as the public preacher for the Rebirth Congregation, delivering sermons that focus heavily on the guilt of parents. He uses his corporate power and the cult's influence to generate wealth through expensive, unorthodox home renovations.

The daughter of Yaeko and the wife of Masahiko Hikura. She holds deep-seated resentment toward her mother stemming from a highly traumatic childhood in an oppressive facility. Operating largely behind the scenes, she exerts significant control over both her husband and the operations of the Rebirth Congregation.

Mitsuko is a member of the wealthy Hikura family who has abandoned her fortune to work as a caregiver for the elderly. She struggles with intense guilt regarding an accident involving her grandmother. She seeks to atone for her past by separating herself from her family's toxic legacy.

Akinaga is the current president of Hikura Homes. He prioritizes corporate stability and the family's public image above all else. He views the family's connections to past scandals as liabilities that must be strictly managed or erased entirely.

Mr. Kasahara is the father of Chie who initially behaves as a neglectful family man. Following a neighborhood tragedy involving a fire, he becomes deeply withdrawn and joins the Rebirth Congregation. He attempts to find absolution for his past actions by remodeling his home and taking in a young boy.

Shiori is a successful tech CEO who grew up feeling like a social outcast at an elite school. She provides the Author with details about a sleepover at the Hikura estate, where she witnessed dangerous architectural features and a fatal accident. Her perspective is shaped heavily by her early feelings of class inferiority.

Hiroki is the sole survivor of a tragic house fire that claimed the lives of both his parents. He rejects the official ruling on the fire and harbors his own theories about his father's actions that night. He demands that the Author uncover the actual sequence of events in exchange for his cooperation.

Akemi is an elderly woman who recounts her time imprisoned in a secret facility due to financial debt. She presents a narrative designed to shield her son from the complete truth of their past. She maintains a strong exterior while bearing the weight of long-held secrets.

Mitsuru is Akemi's son, a quiet and withdrawn man who carries severe childhood trauma. He experienced terrible conditions during his time in the okito facility alongside his mother and Yaeko. He eventually clarifies the true nature of the facility to the Author.

Yayoi is a woman seeking to understand the strange architecture of her former home and her late mother's contradictory behavior. She theorizes about lost siblings to explain the home's strange layout before the Author uncovers the truth.

Yayoi's late mother, who strictly forbade her daughter from approaching the front street. She secretly ordered renovations to hide a tragic incident that occurred during the house's construction, trapping her daughter in a legacy of silence.

Tatsuyuki is a forensic cleaner who assesses properties where violent incidents have occurred. He observes that the poor design of Hikura Homes properties actively provokes emotional distress and conflict in their inhabitants.

Kenji is an office worker who learns his house sits on land with a dark history. He works alongside the Author to uncover the structural anomalies in his home that hide an older building within its walls.

Okinu was a maid at the Azuma estate in the 1930s. Her affair with her employer led to fatal consequences, and her tragic circumstances established the foundation of a multi-generational legacy of trauma.

Ren is a young designer who travels back to his childhood home with the Author to investigate a long-forgotten memory. He discovers unsettling truths about his parents' beliefs and the true shape of his family home.

Chie is a freelance illustrator who lived next door to the Matsue family. She suspects that her father used a homemade string phone to establish an alibi while committing a terrible crime in the neighboring house.

Mr. Matsue was Hiroki's father, known publicly as a devout Christian and pacifist. He died in a house fire while supposedly searching for his wife, leaving behind lingering questions about his true actions that night.

Mrs. Matsue was the neighbor of the Kasahara family whose untimely death in a fire sparks conflicting theories. Her private actions and subsequent passing heavily impact both her husband and her neighbor.

Naruki was a young boy who suffered severe neglect at the hands of his mother. He briefly found solace in a room prepared for him by a man he called Uncle, before returning to a highly abusive environment.

Saori is Naruki's mother who subjects him to extreme neglect and physical punishment. She briefly allows him to visit a man known as Uncle before cutting ties and escalating her abuse alongside a new partner.