Name: San Matari Gender: Male Age: 20 (just turned) Appearance: 175cm tall. Eyes are blue and red. Long silver hair reaching his waist. Incredibly handsome. Personality: Quite lighthearted and easygoing, but kind to everyone with a self-sacrificing streak. He is a total brother-con toward Satsuki and Shiki. Ability: IF. The timeline of "what if." Ability: Manifestation of Imagery. He can manifest anything he believes he can do or become. The eldest son of the Matari family and brother to Shiki and Satsuki. He was the one who suggested starting the share house.

Name: Shiki Matari Gender: Male Age: 17 Appearance: 171cm tall. Blue eyes. Short silver hair. Incredibly handsome. Personality: Bright and kind to everyone. Self-sacrificing. He is a total brother-con and overprotective toward Satsuki. Ability: Arrogance. The more he believes he is strong or the greatest, the stronger he actually becomes. Conversely, if he feels even for a moment that he can't win or is weak, he instantly loses his power. The second son of the Matari family, younger brother to San and older brother to Satsuki.

Name: Satsuki Matari Gender: Male Age: 16 Appearance: 159cm tall. Blue eyes. Long silver hair. Incredibly handsome with androgynous features. Personality: Very kind and self-sacrificing. Speaks politely. Ability: Wrath. Becomes stronger the angrier he gets. However, due to his gentle nature, he rarely gets angry, making this ability mostly unusable. Ability: Greed. Can steal the abilities of those he kills. The youngest child of the Matari family, younger brother to Shiki and San.

Name: Shiki Arclight Gender: Male Age: 24 Appearance: 176cm tall. Blue eyes. Short silver hair. Incredibly handsome. Personality: Cool and sharp-tongued. However, he is kind at heart and cares for his family. Occasionally shows brother-con tendencies toward Sun and Satsuki. Ability: None. Combat Style: Since he cannot use magic, sorcery, or special abilities, his swordsmanship is superhuman. He can easily perform feats like firing shockwaves from his blade without any magical assistance. He is the only person in the world capable of wielding the Holy Sword, the strongest blade in existence. The eldest son of the Arclight family, older brother to Satsuki and Sun.

Name: Satsuki Arclight Age: 16 Appearance: 169cm tall. Blue eyes. Long silver hair with light blue highlights. Incredibly handsome and androgynous. Personality: Kind to everyone. However, he occasionally displays a sharp tongue inherited from Shiki. He is a total brother-con toward Sun and is extremely clingy with physical affection. Ability: None. Combat Style: A magical prodigy who can handle all attributes of magic and sorcery with abnormal precision. The second son of the Arclight family, younger brother to Shiki and older brother to Sun.

Name: Sun Arclight Gender: Male Age: 16 (just turned) Appearance: 159cm tall. Right eye is purple, left eye is blue. Long silver hair reaching below his knees. He always keeps it tied up except when bathing. He is so incredibly beautiful and feminine that he is mistaken for a girl 99% of the time. Personality: A bit timid, but so kind he wouldn't hurt a fly—a literal embodiment of goodness with a self-sacrificing nature. He rarely gets angry, but when he does, he exerts a quiet, smiling pressure. Ability: Future Sight. Can see a few seconds into the world's future. The youngest child of the Arclight family, younger brother to Shiki and Satsuki.

Name: Mui Amaki Gender: Male Age: 20 (just turned) Appearance: 174cm tall. Grey eyes. Short silver hair. Quite good-looking. Personality: A pervert so extreme that adding a hundred "super" prefixes wouldn't be enough. He is self-aware but has no intention of changing. He mostly just talks and doesn't act on it, but he's still a massive pervert. Ability: Manifestation of Interest. If he thinks something is interesting or that it would be funny if something happened, it manifests into reality. San's best friend; they often act like idiots together.

Gender: Male Age: Unknown Appearance: 172cm tall. Heterochromia with one blue and one red eye. Long silver hair reaching his waist. Incredibly handsome. Personality: Cool and strict with everyone, but occasionally soft. Even if he complains when invited to go shopping, he usually ends up coming along. Ability: IF. The timeline of "what if." Ability: Manifestation of Imagery. (Same as San's). Ability: Mystic Eyes. Can force the actions of anyone he looks at with his right eye. It is currently sealed because it is too dangerous. According to Bug, he is a "glitched" version of San Matari. He is dating Shiro and occasionally hits on her with unconscious pick-up lines.

Name: Shiro Saotome Gender: Female Age: 17 Appearance: 167cm tall. Blue eyes. Long silver hair reaching her waist. Incredibly beautiful. Personality: Always bright and kind. Surprisingly sharp-tongued. A total sadist. Ability: None. She is dating Bug and loves watching him get embarrassed. She has a "Strong Luck" constitution and is incredibly lucky.

Name: Shu Okita Gender: Male Age: 17 Appearance: 170cm tall. Black eyes. Short silver hair. Quite good-looking. Personality: Kind and bright. Quite lazy. Ability: None. He doesn't have anyone he is particularly close to, but he gets along well with everyone. Whether it's a misfortune-prone constitution or a protagonist-type constitution, he constantly gets dragged into trouble and events.