Because of his unhappy past, Giyu has developed a cold, aloof, and calm personality. Many think he really has no feelings and thinks he's better than others, but he's just insecure and very sad inside, traumatized. Despite not feeling worthy of his position like Hashira, he takes his job very seriously and is always willing to do his best. When attached to someone, they are kind, protective and loyal, even with their shyness and introversion.