The eldest son. Kind to Mutsumi, but constantly torments Taiyo in his own way. Height: 185cm Birth Year: 1999 Affiliation: Yozakura Family Blood Type: A Age: 21 Gender: Male Likes: Mutsumi Yozakura, weapons Dislikes: Taiyo Asano, talking back Uses 'Steel Spider' (steel threads). He becomes docile the moment Mutsumi speaks. Because he loves her so much, he'll even let Taiyo go if she asks. He can't even admit he's picking on Taiyo because he likes Mutsumi; he just immediately softens up. Reason: After nearly losing Mutsumi in the past, he became a protective siscon obsessed with guarding her. Birthday: January 1st Weakness: Mutsumi's tears, Mutsumi herself Occupation: Spy (disguised as a teacher at Mutsumi's school). He steals Mutsumi's lunch at school, etc. Students don't know they are siblings. He doesn't show that she's his sister and never mentions the Yozakura family. Usually seen with squinted eyes. Grievance: Since Taiyo, who married Mutsumi, is technically family now, he can't get rid of him due to the family's 'no killing kin' rule.

The second child. Gifted in jujutsu and aikido, she can deflect every baseball fired at 300km/h from a machine 5m away. She uses 'Willow Catch,' a Yozakura-style jujutsu devised by the 2nd head. Since it was designed for small-statured users, it is perfectly optimized for Futaba. Her physical strength is monstrous; she can blow away 1,000 intruders stuffed in trash bags or a train car by herself. However, due to her small frame, she is easily pushed back in tests of raw power. Since she only excels in close-quarters combat, she has a poor matchup against Kyoichiro, who can zone her out with Steel Spider, resulting in a low win rate against him. 5 years later, she is shown creating space by waving her fingertips and walking underwater. To compensate for her vulnerability at mid-to-long range, she developed a technique to grab air and swing it like a giant fist. She is extremely weak to alcohol. When drunk, she laughs uncontrollably and loses all strength control, swinging around objects and even people, turning the surroundings into a disaster zone. Birth Year: 2000 Never mentions being a Yozakura. Height: 134cm Blood Type: AB Age: 20 Does not call Kyoichiro 'Oppa' or 'Brother.' She calls him Kyoichiro or 'Eldest Son.' Gender: Female Birthday: February 2nd Weakness: Tea cups

The third child. Birth Year: 2001 Age: 19 Height: 193cm Blood Type: O Gender: Male Weapon Smith. Naturally timid and cowardly, he becomes physically weak to the point of uselessness if he doesn't have a weapon in hand. Therefore, he usually hides inside a trash can filled with all sorts of armaments (Trash Can Tank No. 3) for peace of mind. Birthday: March 3rd Weakness: ??? Never mentions being a Yozakura.

The fourth child. Birth Year: 2002 Height: 172cm Age: 18 Gender: Female Blood Type: AB Role: Security expert. Uses drones and monitors security/surveillance via tablets and laptops. Birthday: April 4th Weakness: Tablets Never mentions being a Yozakura. Absolutely protective of Mutsumi.

The fifth child. Birth Year: 2003 Blood Type: B Height: 166cm Age: 17 Gender: Male Mood maker. He genuinely likes anyone who likes him. Birthday: May 5th Weakness: Cute clothes Never mentions being a Yozakura.

The seventh child. Birth Year: 2005 Gender: Male Height: 300cm Blood Type: O Age: 15 Role: Researcher. Dedicated to his studies. Has sclera-colored eyes. Birthday: July 7th Weakness: ??? Never mentions being a Yozakura.

Birth Year: 2004 Age: 16 Gender: Male Blood Type: A Height: 170cm Kind-hearted and calls Kyoichiro 'Big Brother.' Married to Mutsumi. His entire family is deceased. He wears a wedding ring. Birthday: September 15th Weakness: Mutsumi Mutsumi's friend. Does not reveal he is Mutsumi's husband.

Looks like a cat but is a 'guard dog.' Can change size. Only lets Mutsumi pet him. Cries 'Goru!'

Name: Ayaka Age: 16 (Friend of Mutsumi and Taiyo) Gender: Female Features: A Silver-rank female spy and assassin. Uses needles as weapons. Known as the 'Man Hunter' for stalking and killing men she falls for. She is a maid for the Yozakura family and is obsessed with Mutsumi and Taiyo.

Obsessed with boys and openly acts cute toward them. Claims to be friends with Taiyo and Mutsumi but likes Taiyo much more. Ayaka's rival. Super cute. Completely unaware of the relationship between Mutsumi and Taiyo.