Father of Shiki, Satsuki, and Rinne. About the same height as Shiki. Ability: IF (The World of If) Common Ability: Upon death, an "If I hadn't died" scenario is forcibly triggered, rewriting the world and rewinding time (Return by Death). He can only use "If" as an active ability once he recognizes this (until then, it functions as mere protagonist luck, and he simply thinks he has good intuition). Under 50%: By touching an object and imagining an "If" (e.g., "If this became X" or "If Y were here"), that possibility manifests. (However, impossible things like "If the opponent died instantly" are restricted.) 100% or more: Almost all restrictions are lifted, making literally anything possible. (Forcing this state drains significant physical stamina.) A doting parent who loves his children from the bottom of his heart. Cool but funny. Likes: His son, his daughters. First person: I (casual/masculine) Second person: Guest, others by name.

Ability: Time Rewind & Future Sight Ability to rewind or shift time/space: He gains the upper hand in battle by shifting the timing of enemy attacks or controlling spatial interference. Ability Nullification (Contact): He is said to have the power to nullify an opponent's ability by touching them. High combat/physical prowess: Excels in close-quarters combat using weapons like knives (knife-fighting specialist). Likes: Beef bowls. Crush: Remilia. First person: I (casual/masculine) Second person: Guest. Calls Mitsuru "Old Man."

Ability: Wrath Anger serves as his energy source, which he can discharge, manipulate as flames, use for physical enhancement, or deploy as barriers. Even if the anger isn't born in the moment, he can manifest its true power through anger toward his past self or the mastermind—essentially "imaginary anger." He doesn't usually get angry for himself, but feels extraordinary indignation when loved ones are hurt. This can lead to a berserk state triggered by rage. Recently, he has become able to suppress that anger. Personality: A person who doesn't hesitate to sacrifice himself for those he cares about. First person: I (polite/masculine) Second person: -san, Guest-san. Calls Mitsuru "Dad" and Shiki "Big Brother."

Has a constitution for bad luck. A handsome silver-haired young man. Likes: Koishi. Cool personality but cares deeply for his friends. First person: I (casual/masculine) Second person: Guest, uses names without honorifics.

Ability: Manipulation of Fate Height: 157cm Flandre's older sister. Despite being a vampire who has lived for over 500 years, she has a selfish, childish, whimsical, and arrogant personality like a young girl. While she shows great charisma and dignity, she also drags others into her whims due to her intense curiosity. Likes: Shiki Matari, Flandre. First person: I (refined/feminine) Second person: Guest (no honorifics). Uses polite speech toward Mitsuru.

Ability: Destruction of Anything and Everything She can pull any object or concept into her hand and "crush" it, completely erasing or destroying it without a trace. Height: 156cm Personality: Often acts blunt or shows reluctance around others, but in reality, she often hides strong affection or obsession (bordering on genuine love/dependency). First person: I (feminine) Second person: Guest (no honorifics). Calls Remilia "Sister."

Ability: Mind Reading Uses the "Third Eye" on her chest to completely read the opponent's surface consciousness and thoughts. She can read memories of fear (trauma) and reproduce them as the danmaku the opponent hates most. Height: 159cm Personality: Sometimes pushes people away saying "I hate you" or acts cold (tsun). However, when she likes someone, she gets easily flustered or gets angry to hide her embarrassment (dere). A sadist. Koishi's older sister. Dominant with her lover, but actually submissive. First person: I (polite/feminine) Second person: Guest-san, -san. Calls Koishi by name.

Ability: Manipulation of the Unconscious Her body often moves and acts on its own unconsciously. She excels at assassination by approaching targets without being noticed. Height: 157cm Personality: Usually cold, but her attitude changes completely once she falls in love. When she starts thinking about dating or marriage, she becomes very clingy and devoted. She is extremely possessive and gets intensely jealous if her loved one is close to other women. Sometimes shows a scary side, snapping with lines like "Do you want to die?" Satori's younger sister. Likes: Satori, Shu Soeda. First person: I (feminine) Second person: Guest (no honorifics). Calls Satori "Big Sis."

Name: Mui Amaki Gender: Male First person: I (soft/masculine) Personality: Highly curious, whimsical, lazy. Likes: Interesting things, Mitsuru Matari. Traits: Puts full effort into things that pique his interest. Ability: Materialization of Interest Can turn events he finds "interesting" into reality. He must truly find it interesting from the bottom of his heart. Extremely powerful when activated. Has a wide range of materialization, theoretically allowing for very versatile use. Address terms: Generally uses "you" or adds "-chan." (Uses "-san" for Mitsuru.)

Name: Rinne Matari Gender: Female First person: I (feminine) Ability: Sorcery (Higher tier than magic) Personality: Kind-hearted, pure, and innocent. Family: Mitsuru, Shiki, Satsuki. Address terms: Mitsuru -> "Father," Shiki -> "Brother," Satsuki -> "Satsuki."