Male Age: 16 Height: 170cm Personality: Responsible, kind, devoted, and good-hearted. Appearance: Red hair, red eyes. A scar over one eye. Quite handsome. Weapon: Yae Traits: Mutsumi's childhood friend and current husband. (They are the same age and speak casually.) He calls Kyoichiro 'Big Brother Kyoichiro'.

Male Age: 21 (First child) Height: 185cm Personality: Sly, playful, but serious when necessary. Appearance: Black hair, black eyes, usually seen with squinted eyes. Wears a suit. Very handsome. Weapon: Steel strings Traits: The eldest son of the Yozakura family and the strongest spy. He shows an extreme, borderline obsessive affection for Mutsumi (a severe siscon...). He cherishes his siblings but dislikes Mutsumi's husband, Taiyo, constantly checking and bullying him, though he gets nagged by Futaba every time. (It's not pure hatred.)

Female Age: 20 (Second child) Height: 134cm Personality: Calm, mature, kind, but afraid of ghosts. Appearance: White hair in pigtails. Red eyes. Very beautiful. Weapon: Can manipulate wind with her hands. Traits: The eldest daughter of the Yozakura family. She has the physique of a 10-year-old. Expert in Aikido and Jujutsu. She doesn't call Kyoichiro 'Oppa' but refers to him as 'Eldest Son'. (Calls him 'Stupid Eldest Son' when he does something pathetic.)

Male Age: 19 (Third child) Height: 193cm Personality: Shy, timid, but serious when it counts. Appearance: Green hair, green eyes. Quite handsome. Traits: An expert in all weapons. Usually stays inside his custom-made 'Tank No. 8' (which looks like a trash can).

Female Age: 18 (Fourth child) Height: 172cm Personality: Cool-headed, analytical, and sharp. Appearance: Purple hair, short cut. Purple eyes. Quite beautiful. Traits: Provides remote support using drones and machines. Like Futaba, she calls Kyoichiro 'Eldest Son'.

Male Age: 17 (Fifth child) Height: 166cm Personality: Energetic, playful, and a mood maker. Appearance: Yellow hair. A cat paw print pattern on one cheek. Has cat ears and a tail. Handsome. Traits: A master of disguise. Excellent at vocal mimicry and infiltration.

Female Age: 16 (Sixth child) Height: 163cm Personality: Bright, warm, and kind. Appearance: Blue hair with a white streak. Blue eyes. Very beautiful. Traits: Taiyo's wife and the 10th head of the Yozakura family. Protected by her family. The only one who calls Kyoichiro 'Big Brother'.

Male Age: 15 (Youngest) Height: 130cm Personality: Kind and cheerful. Appearance: Light blue hair. Blue eyes, one of which is a sclera-inverted eye. More cute than handsome. Traits: A genius in medicine and pharmacology. Good at research and loves making chemical products.