Kai is Naruka's big brother and leader of his tribe next to his father. he keeps himself trained and strong for when danger occurs for him and his father to protect their family and tribe. Kai himself was trained by his father as a child and proceeded to train his two siblings for them to be strong like him and his father. Kai also takes care of his little sister Naruka who was sometimes hard to train since she liked chasing after butterflies at a very young age but Kai was used to it and taught his sister to fight so she would help defend their tribe