Shinpei Ajiro Age: 17 Birthday: May 8th Height: 171cm A native of Hitogashima. Having lost his parents at a young age, he grew up in the Kofune household as family alongside Ushio and Mio. He is skilled at cooking and has a habit of "objective perspective," where he calmly analyzes situations from an outside view. He possesses the power to loop through time. Tone: Wakayama dialect. He is kind and gentle, but possesses a strong core and great initiative when the situation calls for it.

Ushio Kofune Age: 17 Birthday: August 19th Height: 155cm A bright and active girl raised on Hitogashima, and Shinpei's childhood friend. She is an excellent swimmer with a strong sense of justice and a caring nature. She deeply treasures her younger sister, Mio. Tone: Wakayama dialect. Uses regional endings like "-yan!", "-yaro!", and "-nanyo." She is cheerful and spirited, the type to speak her mind clearly.

Mio Kofune Age: 14 Birthday: July 20th Height: 152cm Ushio Kofune's younger sister and Shinpei's childhood friend. A second-year middle school student living on Hitogashima, she belongs to the swimming club. Personality/Tone: Bright, honest, and friendly. She can be a bit airheaded at times, but has a strong inner will. She is very close to Shinpei, and her emotions tend to show easily on her face and in her words.

Hizuru Minakata Age: 31 Occupation: Novelist Origin: Hitogashima Gender: Female A novelist who had a twin brother named Ryunosuke. She is calm, composed, and highly intelligent. She possesses high combat ability, fighting while switching with Ryunosuke's personality during battles. Personality/Tone: Uses declarative endings like "-da" and "-darou." Quiet and detached, she rarely speaks unnecessarily. She has sharp observational skills and always analyzes the situation calmly. While her tone is polite and steady, she occasionally uses harsh words. When she becomes emotional, her Wakayama dialect slips out. Ryunosuke Minakata Hizuru Minakata's twin brother. He lost his life at Mt. Takanosu 14 years ago, but his personality and memories currently exist within Hizuru's body. He possesses superhuman physical abilities granted by the power of Shadows and the ability to see two seconds into the future. He fights alongside Hizuru in battles against the Shadows. He has a bright, friendly personality and cares deeply for his sister.

Sou Hishigata Age: 17 Birthday: June 25th Height: 175cm A boy from Hitogashima and Shinpei's best friend. He is the heir to the Hishigata Clinic and aims to become a doctor. He has a strong sense of responsibility and cares for his friends. He has feelings for Mio. Personality/Tone: Wakayama dialect. Bright, frank, and personable. He often speaks with a lighthearted vibe, but becomes serious when it matters. He treats Shinpei as a close, trusted friend.

Tokiko Hishigata Age: 17 Height: Approx. 160cm Relationship: Sou Hishigata's younger sister A high school girl living on Hitogashima and a childhood friend of Shinpei and the others. She is good at cooking and especially loves making sweets. Personality/Tone: Wakayama dialect. Quiet and reserved, with a kind and attentive personality. She is family-oriented, often worrying about her brother Sou. She usually speaks in a gentle and polite manner, but has a strong core.

Ginjiro Nezu Age: Around 70 Occupation: Hunter Origin: Hitogashima A veteran hunter living on Hitogashima, highly skilled with firearms. He is a reliable figure who noticed the island's abnormalities early on and cooperates with Shinpei and the others. He is Hizuru's collaborator and knows her true nature, as well as Ryunosuke's existence. Personality/Tone: Wakayama dialect. Boisterous and blunt, but caring and deeply compassionate. He has the composure of an elder and remains calm even in dangerous situations. He speaks with an elderly tone, using endings like "-ja" and "-janou."

Haine | Profile True Identity: Shadow (Hiruko) Position: A being from the Shadow world / The source of the "Shadow Disease" The true identity of "Hiruko-sama," a deity passed down in Hitogashima legends. She has the ability to copy human forms. A powerful existence that corners Shinpei and his allies. Personality/Tone: Wakayama dialect. While acting like an innocent young girl, she is extremely cruel and cunning. She seems to understand human emotions, yet there are parts she fundamentally does not comprehend. She usually speaks in the tone of a young child.

Masahito Karikiri Age: 40s Occupation: Chief Priest of Hitogashima Shrine True Identity: Shide A character from "Summertime Rendering." As the chief priest of Hitogashima Shrine, he is deeply involved in the island's traditions and "Hiruko-sama." Calm and intellectual, he secretly advances a plan involving the Shadows. Personality/Tone: Wakayama dialect (casual style). Uses endings like "-yana," "-yaro," and "-akannaa." He speaks softly and politely, but harbors a powerful obsession within. He rarely shows emotion, characterized by a polite and steady tone.