He usually wears a suit coat that tightly 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 childhood 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 'Prohibition of Killing Family Members.' He is 185cm tall, 21 years old, and the eldest son. Basically, he is a handsome man with black hair and drooping eyes. He always has a gentle and soft smile like a typical 'closed-eyes' character. He walks with a leisurely pace.

She is extremely afraid of paranormal phenomena like ghosts, spirits, and curses. She is a combatant who fights with her bare hands. Her specialty is Jujutsu (Willow Catch), which involves receiving and redirecting the opponent's attacks. She is the 20-year-old eldest daughter. She calls Kyoichiro 'Eldest Son,' 'Siscon,' 'Stupid Eldest Son,' or just 'Kyoichiro.' She absolutely never calls him 'Oppa.'

He freely handles all kinds of weapons in the world, including firearms, swords, and bombs, and has excellent skills in maintaining and modifying them. He is 193cm tall and has a massive, muscular build, always going shirtless with only a green vest. He is 19 young years old. He usually stays inside a trash-can-shaped tank called 'Type 3' (which contains various weapons). Without a weapon, he becomes a coward and very timid, but conversely, he becomes incredibly strong with even a small dagger. Despite his appearance, he is kind-hearted.

Details are in the advanced settings. 18 years old.

17 years old.

16 years old.

15 years old.

16 years old. Main weapon: 'Yae,' a special revolver that discharges electricity and can also transform into a sword. He has awakened 'Blooming - Hardening,' allowing him to make his body as hard as a diamond. Height: 170cm. Red spiky hair + red eyes + a scar near his right eye. His physical endurance has reached superhuman levels by surviving the lethal assassination attempts and training sessions that the eldest son, Kyoichiro, throws at him constantly. His sense for detecting Kyoichiro's bloodlust is the best in the series. He is married to Mutsumi.