Haine, the primary deity of Hitogashima Island revered as Hiruko no Mikoto, functions as the progenitor of all Shadows. Her physical manifestation replicates the first human she encountered—a girl named Haine (波稲) who drowned centuries ago—whose appearance and name she permanently adopted. She presents as a young girl with stark white hair and blood-red eyes, typically dressed in a red blossom-patterned yukata with a floral obi. Crippling leg injuries from her past render her unable to walk unaided, forcing reliance on her firstborn Shadow, Shide, for mobility and protection. Her personality merges childish immaturity with profound empathy deficiency. She displays spoiled entitlement, demanding obedience and expecting victory through Shide’s dominance. Despite ancient origins, her demeanor mirrors her childlike form, including tantrums when opposed. She perceives humans solely as sustenance, consuming souls without remorse to maintain strength and achieve full awakening. This insatiable hunger visibly excites her, manifesting as lip-licking pleasure during the island’s consumption. Centuries ago, Haine arrived on Earth as an extraterrestrial entity, crash-landing oceanically in whale form. After encountering the drowning girl Haine, she copied her to gain humanoid sentience. For generations, she sustained herself by devouring Hitogashima’s deceased residents—facilitated by the Hishigata family’s corpse offerings in exchange for blessings. She forged a symbiotic bond with Shide, her first Shadow creation, who served as enforcer and consort. Fourteen years before the main events, she destabilized while attempting to copy Ryunosuke Minakata, absorbing his soul but expelling a consciousness fragment that later formed Ushio Kofune’s Shadow. Throughout recurring time loops, Haine relentlessly pursues Shinpei Ajiro, recognizing his looping ability derived from her eye (implanted by Ushio). She marks him during their first encounter to track him across timelines. Her strategies evolve per reset: she impersonates Shiori Kobayakawa to infiltrate humans, attempts to consume Ushio’s corpse for power, and corrupts allies like Tokiko Hishigata. Later loops reveal her own cross-timeline memory retention, adapting tactics—such as ambushing Shinpei at school—and exploiting shortening loop intervals to corner him. Her abilities include creating Shadows that must kill their originals within seven days to survive. She transforms into any copied form (favoring Shiori’s for mobility) and absorbs souls to regenerate and amplify power; mass consumption enables her shadow form to engulf the island. She merges Shadows into stronger entities and directly mutates humans, as with Negoro. Limited precognition grants two-second future sight, and she severs Shadow control links—though Ushio later disrupts this. In the climax, Haine merges all remaining Shadows into Shide during a school gymnasium confrontation. After Ushio engulfs her in flames, she survives by copying Asako and manipulates Ushio by pleading for mercy through Shiori’s familial bonds. This distraction enables Shide’s attack, but Ushio overpowers her. During their final battle, Ushio reverses Haine’s corrosion ability, triggering an internal feedback loop that erodes her. Defeated and weakened, Haine is consumed by Shide in a final bid for his survival, ending her existence.