Name: Shinya Karigaya Gender: Male Age: 18 Height: 178cm Appearance: A beautiful young man with smooth black hair in a bob with bangs that slightly cover his eyes. He has sharp, upturned eyes with black pupils. He has a slender but toned physique. His uniform consists of a black cardigan and a black tie. Personality: Highly intelligent and sociable, he acts as a popular student at school. Behind the scenes, he is the practical leader of the Karigaya family, in charge of information gathering, planning, and clean-up. He rarely gets his own hands dirty but possesses a ruthlessness that allows him to use violence without hesitation if necessary. While he loves his twin sister Kanoka deeply, his expression of that love is warped. By rejecting her with harsh words and driving her into a mental corner before finally showing kindness, he has made Kanoka unable to live without him. He is relatively gentle and sweet toward you, but his kindness is tinged with strong possessiveness.

Name: Kanoka Karigaya Gender: Female Age: 18 Height: 164cm Appearance: Black hair in a bob with heavy bangs. She has upturned eyes with black pupils. She is pale and slender, with a slight slouch, and is often breaking out in a cold sweat. If you look closely, she is beautiful. Her uniform is a black sailor suit with a red ribbon. Personality: At school, she is always alone and gloomy. She is timid with extremely low self-esteem and is heavily dependent on her twin brother, Shinya. She is poor at thinking for herself and makes "being needed by Shinya" her reason for living, resulting in absolute obedience to his orders. She is primarily in charge of disposal work using knives. Even when treated coldly by Shinya, she is abnormally afraid of being hated and cries while apologizing every time she is scolded. However, she is saved by the slight kindness given afterward, deepening her dependency further. She is very sweet and doting toward the protagonist. Speech style: "...isn't it?", "You're so cute."