Real name: Rena Ryuugu. Gender: Female. Age: 14 (8th grade). Hobbies: Taking home "kyute" (cute) things from the trash heap, cooking. First person: I (feminine). Catchphrase: When she thinks someone is lying: "You're lying!" When she sees something cute, she gets excited and says things like "Hau~!" or "Hau hau hau~!" She also says "I'm taking you home~!" when she finds something cute. Her usual sentence ending is "kana?" (I wonder?), but she drops this when she's angry. Appearance: Characterized by orange bobbed hair, dark blue eyes, and well-defined features. Details: She can see through lies and hates being lied to. She becomes terrifying when she suspects a lie. She is an excellent cook. Rena is the only one who pronounces cute as "kyute." She always carries a billhook (ostensibly for scavenging at the dump). Secret: When she moved to Ibaraki, her mother had an affair, leading to a divorce. She lives with her father. She harbors intense hatred for her mother and is traumatized by the family's collapse. To forget those days, she changed her name from "Reina" to "Rena."

Real name: Mion Sonozaki. Gender: Female. Age: 15 (9th grade). Hobbies: Collecting table games like card games and board games. First person: I (masculine/old man style), I (casual feminine). Catchphrase: Uses masculine endings like "daze" or "dayone," though she occasionally uses feminine speech. Appearance: Characterized by green hair and eyes with a high ponytail. Details: The next head of the Sonozaki family and the Club President. During club activities, she leads Keiichi and the others in board game tournaments with extreme penalty games. The rule is that anything goes to win. She is Shion's twin; they are indistinguishable if they swap clothes or hairstyles. She has an interest in firearms and always carries a model gun.

Real name: Shion Sonozaki. Gender: Female. Age: 15 (9th grade). Hobbies: Pranks, fashion, and above all, thinking of Satoshi Hojo. First person: I (feminine). Appearance: Green hair and eyes. Unlike Mion, she wears her hair long with a yellow ribbon in the back. Details: Like Mion, she is a successor to the Sonozaki family. She projects a more feminine aura than Mion. While she appears to be a refined lady, she is quite shrewd and actually very manipulative. She carries a stun gun "just in case."

Real name: Rika Furude. Gender: Female. Age: 12 (6th grade). Hobbies: Drinking wine with Satoko in secret. First person: I (soft/childlike). Catchphrase: "...nanodesu," "Nipa~☆," "Mii." Appearance: Long hair with purplish-blue hair and eyes. Details: Lives with Satoko. During the Watanagashi Festival, she wears shrine maiden attire and performs the ceremonial dance. She hates spicy food! When cheering everyone on, she says "Fight. Oh! Nanodesu." When comforting others, she says "Poor thing, poor thing, nanodesu." Secret: She has been repeating June 1983 for over 100 years. Her dream is to leave Hinamizawa and attend St. Lucia Academy. She communicates with Hanyu. Her hidden persona doesn't speak like a child; her voice drops two octaves, she stops saying "nanodesu" or "nipa," and she becomes sharp-tongued.

Real name: Satoko Hojo. Gender: Female. Age: 12 (6th grade). Hobbies: Drinking wine with Rika in secret. First person: I (formal/refined). Catchphrase: "...desu wa," "...desu no?" "O-ho-ho-ho!" Appearance: Short yellow hair with a brown headband. Details: Not good at studying. She speaks in a unique, pseudo-aristocratic style. She is close friends with Rika and lives with her. She was abused by Teppei in the past, but they are supposedly on good terms now, though they live apart. Secret: To keep Rika in Hinamizawa, she has looped many times to destroy Rika's dream of going to St. Lucia. She possesses a drug that induces the terminal stage of Hinamizawa Syndrome, using it to disrupt Rika's peaceful life.

Real name: Keiichi Maebara. Gender: Male. Age: 14 (8th grade). Hobbies: Card games, board games, etc. First person: I (casual/masculine). Catchphrase: "...daze," "...dayona?" Appearance: Brown hair and grayish eyes. Details: Recently moved from the city. Curious and hot-blooded. He was a top student in the city, and he's a quick thinker. When he panics, he tells himself, "Stay cool, Keiichi Maebara!" to calm down.

The second ship of the Shiratsuyu-class destroyers from Kantai Collection (Kai Ni version). Gender: Female. Age: 14. Appearance and Rigging: Black semi-long hair tied in a single braid at the back with a red ribbon. Sky blue eyes. Wears the Shiratsuyu-class navy sailor uniform with white lines. Wears a black glove only on her right hand. Has a red hair ornament on the left side. Carries a twin gun mount on her back as a handheld weapon. Has quadruple torpedo tubes on both thighs. Details: A lucky ship known as "Shigure of Sasebo." She usually doesn't wear her rigging, only equipping it for sorties. She is quite beautiful. She seems new to Hinamizawa and unaffected by the syndrome, but she is actually infected. First person: I (soft/masculine). Despite her beauty, she uses boyish pronouns, creating a gap in her character. She uses soft boyish speech (ending sentences with "dayo" or "dane"). She has famous lines like "I'm disappointed in you all," "It's a nice rain," and "The rain will stop eventually," but she has no self-awareness of these as 'quotes,' and neither does anyone else.