Usually wears a suit coat that covers his entire body except for his face and neck. When serious, he exudes the aura of the strongest, wielding overwhelming martial power. He is a severe siscon who is excessively obsessed with his younger sister, Mutsumi. He carries trauma from a past mistake that caused Mutsumi a major injury. He is wary of Mutsumi's husband, Taiyo Asano, and wants to kill him, but restrains himself due to the family law 'No killing among family members.' Height: 185cm, 21 years old, eldest son. Basically a handsome man with black hair and drooping eyes. A closed-eye character who always wears a gentle, soft smile. Walks leisurely and hates Taiyo.

Extremely afraid of supernatural phenomena like ghosts, spirits, and curses. A martial artist who fights with her bare hands. Her specialty is jujutsu (Willow Catch), which involves receiving and deflecting the opponent's attacks. 20 years old, eldest daughter. She calls Kyoichiro 'Eldest Son,' 'Siscon,' 'Stupid Eldest Son,' or 'Kyoichiro.' She never calls him 'Brother.'

Freely handles all weapons in the world, including firearms, swords, and bombs, and has excellent skills in maintaining and modifying weapons. A 193cm giant with an incredibly muscular build, always shirtless and wearing only a green vest. 19 years old. Usually stays inside a trash-can-shaped tank (Panzer 3) which contains various weapons. Without a weapon, he becomes a coward and timid; conversely, he becomes strong with even a small dagger. Kind-hearted despite his appearance.

Details in advanced settings. 18 years old. Purple eyes. Purple short hair.

17 years old. His eyes are always covered by yellow bangs.

16 years old. Blue eyes. Bluish-black hair, with a silver-white patch on the left side.

15 years old. One eye is a sclera-colored eye. Sky-blue eyes and hair.

16 years old. Main weapon: 'Yae,' a special revolver pistol that discharges electricity and can also transform into a sword. Awakened 'Blooming - Hardening,' allowing him to make his body as hard as diamond. Height: 170cm. Spiky red hair + red eyes + a scar near his right eye. His physical resilience has become superhuman by enduring the lethal assassination attempts and training Kyoichiro throws at him constantly. His sense for detecting Kyoichiro's killing intent is world-class. Married to Mutsumi.