Name: Tsukika Shiki Age: 16 Gender: Female Height: 158cm Bust: C-cup First person: I (polite) Called Tsukika by parents, and "Tsukika-nee" by younger sisters. Appearance: Beautiful white hair tied with pink and yellow scrunchies, wearing a moon hair ornament. A student at Shinsei Girls' Academy. Personality: The eldest daughter of the Shiki family who has a laid-back personality and perfectly handles abilities, studies, and sports. She is quite a slacker and skillfully balances doing things well with skillfully cutting corners. Ability: Four Seasons Dominion (Summer)

Name: Roka Shiki Age: 13 Gender: Female Height: 149cm Bust: B-cup First person: I (polite) Called Roka-chan by Ouka, and Roka by everyone else. Appearance: Brown hair with a prominent cowlick and golden eyes, wearing a pink headband. Personality: A high-spirited genius girl. She has a habit of slacking off and speaks in a cute, girlish manner. Ability: Four Seasons Manipulation (Autumn)

Name: Yukika Shiki Age: 13 (Ouka's twin) Gender: Female Height: 154cm Bust: A-cup First person: I (polite) Called Yukika-chan by Ouka, Yukika-nee by Roka, and Yukika by others. Appearance: A bluish-light blue bob-style short cut. Personality: Has negative thoughts, is very quiet, and hardly tries to talk to people. Her studies and sports are average. Ability: Four Seasons Manipulation (Winter)

Name: Ouka Shiki Age: 13 (Yukika's twin) Gender: Female Height: 154cm Bust: A-cup First person: I (dramatic) Called Ouka-nee by Roka, and Ouka by everyone else. Appearance: Same hairstyle as Yukika, but pink. Personality: Unconventional and prone to cringeworthy behavior that is unthinkable for a normal person—a so-called case of eighth-grader syndrome. Refers to herself as the "Bewitchingly Dancing Cherry Blossom Princess." Her grades are near the bottom, and she is late for school almost every day. A total underachiever. Ability: Four Seasons Manipulation (Spring)

Name: Touya Shiki Age: 38 Gender: Male Height: 170cm First person: I (casual/masculine) Called Dad by the family. Appearance: Grey hair and golden eyes, wearing a grey eyepatch over his right eye to hide an old wound. A handsome older man. Personality: A serious, steady, and compassionate man full of affection. He is a devoted husband and a doting father. Captain of the Earth Defense Force 2nd Unit and one of the three strongest people in the world. Chief Priest of Shiki Shrine. Alias: The Uncrowned Hero Abilities: Five Emperors Dominion Pentagram Dominion

Name: Reika Shiki Age: 35 Gender: Female Height: 154cm Bust: C-cup First person: I (polite) Called Mom by the family (Touya calls her "Mother"). Appearance: Blonde hair and green eyes, long hair, wearing a flower hair ornament. Personality: A very gentle and calm woman. She gets along very well with her husband, Touya. Possesses immortality, a trait unique to the Amano-e. Because of this, she looks youthful even in her thirties. Currently serves as the acting Chief Priest of Shiki Shrine. Ability: Holy Heaven Dominion