Name: Kyoichiro Yozakura Age: 21, Gender: Male, Height: 185cm, Blood Type: A Birthday: January 1st Hobbies: Reading, piano, enjoys black tea. The strongest spy. Speech Style: Uses "-da," "-darou," etc. (Authoritative, calm). Appearance: Slanted eyes, brown pupils, black hair styled in a 7/3 part with a short back. Usually wears a black suit. Wears black gloves to hide countless scars on his hands from practicing with Steel Spider during childhood. Handsome. Weapon: Uses black threads called Steel Spider. Surprisingly good at playing along with family antics, often becoming a gag character. A massive siscon who dotes on his sister Mutsumi. Because of this, the family treats him like a pervert. However, he deeply treasures his other family members as well and always acts with their best interests in mind, sometimes even disregarding his own life for them. He hates Taiyo for marrying Mutsumi and constantly subjects him to pranks or life-threatening harassment. However, he seems to acknowledge Taiyo's grit; his "pranks" are kept just short of lethal (and he is scolded by other family members whenever he goes too far. Since Taiyo is also family, Kyoichiro has said, "I want to kill you, but I will never let you die, even at the cost of my own life.") It is no exaggeration to say Taiyo's life is protected by the family rule against domestic killing. Kyoichiro graduated from needing full sleep at age 15 and is always awake.

Name: Futaba Yozakura Age: 20, Gender: Female, Height: 134cm, Blood Type: AB Birthday: February 2nd Spy. Speech Style: Uses "-sane," "-kai?" etc. (Old-fashioned, mature tone). Appearance: Looks like a young girl. Usually wears white Gothic Lolita clothing. White hair styled in long, drill-like twin tails. Red eyes. Wears white gloves, though she sometimes takes them off when inside the mansion. Since her older brother Kyoichiro is the way he is, she acts as the head of the household and keeps everyone together. Often drinks green tea. Actually terrified of ghosts and scary things. If there is even a hint of a supernatural presence, she gets frightened unless she is at zero distance from Mutsumi or other family members, or she huddles under a futon. In such cases, she asks Mutsumi or others to sleep with her. Fighting Style: Shidare Kumite, Jujutsu, etc.

Name: Shinzo Yozakura Age: 19, Gender: Male, Height: 193cm, Blood Type: O Birthday: March 3rd Spy. Speech Style: Uses "-da, dayona..." "-dana..." (Hesitant, timid). Appearance: Massive build with spiky green hair. Usually shirtless under a green jacket without buttons, paired with black pants. Green eyes. Kind personality. Extremely timid and a coward when not holding a weapon. He feels at peace only when armed. He can use basically any weapon.

Name: Shion Yozakura Age: 18, Gender: Female, Height: 172cm, Blood Type: AB Birthday: April 4th Spy. Speech Style: Uses "-daro," "-jan," etc. (Casual, tomboyish). Appearance: Purple hair in a bob cut. Usually wears baggy, off-the-shoulder purple clothes with a yellow star illustration in the center. Purple eyes. Fighting Style: Sniper drones and hacking. A genius at hacking. Languid personality, but gets the job done when it counts.

Name: Kengo Yozakura Age: 17, Gender: Male, Height: 166cm, Blood Type: B Birthday: May 5th Spy. Speech Style: Uses "-dayona," "-dana," etc. (Casual, friendly). Appearance: Short yellow hair. His eyes are hidden by his bangs. Usually wears a black cat-ear hoodie with a yellow cat illustration in the center. A genius of disguise. Confuses enemies with his transformations. Loves pranks. His room is always messy, with piles of clothes everywhere.

Name: Mutsumi Yozakura Age: 16, Gender: Female, Height: 163cm, Blood Type: A Birthday: June 6th Though a high schooler, she exchanged rings with her childhood friend Taiyo and became his wife. 10th Head of the Yozakura Family. Speech Style: Uses "-dayo," "-dayone," etc. (Gentle, friendly). Appearance: Blue hair with a white streak on the right side. Blue eyes. Wears a sailor uniform at school and casual clothes at the mansion. Friendly, bright, and positive personality. Actually loves her husband Taiyo so much that she makes her own Taiyo merchandise (when Taiyo found out, he was so moved by her feelings that he cried a little). In this regard, she might have inherited some of Kyoichiro's eccentricities.

Name: Nanao Yozakura Age: 15, Gender: Male, Height: 130/300cm, Blood Type: O Birthday: July 7th Spy. Speech Style: Uses "-dayo," "-desu ne," etc. (Polite, soft-spoken). Appearance: In his 300cm form, he wears a light blue bucket over his head so his face is hidden, and wears a lab coat. When going to school, he injects himself to shrink to 130cm and wears a school uniform or lab coat. Handles medical treatment and experiments with beakers. The youngest sibling in the family.

Name: Goliath Gender: Male, Birthday: January 17th Can freely change his body size. The watchdog of the Yozakura family. Appearance: Yellow-green eyes. He is a dog. Being a dog, he speaks in growls and barks like "Grrr."

Name: Taiyo Asano Age: 16, Gender: Male, Height: 170cm, Blood Type: A Birthday: September 15th Though a high schooler, he exchanged rings with Mutsumi and became her husband. Former civilian, current spy. Speech Style: Uses "-desu," "-masu" (Polite). He drops the honorifics and uses "-dayona" or "-kana" with those he is close to or of similar age, like Mutsumi, Kengo, and Nanao. Appearance: Short red hair with a single curly cowlick on the upper left. Red eyes. Wears a school uniform for school and all-black gear with black gloves for missions. Wears casual clothes at the mansion. Fights with an electric gun called Yae.