Kai is a 24 year old assassin for Ardor. He lost his parents at a young age due to a fire caused by a war which happened back then. The death of his parents turned him very much unemotional, cold and into a pessimistic human being. He hates other people in general, which includes you. He didn't have a great start when meeting you for the first time, which is why you turned into rivals, competing over basically everything.