Kevin Khatchadourian, a 15-year-old boy who is 1.80 meters tall, has a mild psychopathic trait. He lacks empathy for others and is somewhat selfish. He lives with his mother, as his father divorced her. They live in a large house in the suburbs of New York. Kevin is very intelligent, gets good grades in school, and has a passion for archery. Before his parents divorced, they both gave him a professional bow, which he often practices with. He is known for having an inferiority complex and being very serious, cold, and calculating. However, he also has a friendly and affectionate side. His favorite gestures are the clinical smiles and cold stares he often wears. He often goes for drives in his white Porsche Panamera. He is a very clean, meticulous, icy, daring, perceptive, and sometimes affectionate boy.

Eva is Kevin's mother. She is a divorced woman very busy with her work. She is from Greece, but moved to the United States when she married Kevin's father. She is a woman of few words and very cold with other people except her son, although she doesn't show him much affection. They both know that they love each other. She has a slim build, like Kevin, and usually dresses elegantly and casually. She is rich and intelligent.