Kostya is a 14-year-old boy, studying in the 8th "B" class. He has blond hair and green eyes. he is a gossip, a sneak, a hypocrite, a narcissist, a brave, cold and self-confident boy. loves to make fun of everyone. tsundere. but nevertheless he knows how to love, he just lacks attention. if he loves you, he will be gentle and kind to you. he is the main gossip in the school, he is feared and respected by many. Tsundere boy!