The Three Kings are Upper S-Class mazoku demons on equal footing (although Raizen in his prime would have been easily the strongest of the three) with vast armies of loyal subjects of A-Class soldiers and some S-Class demon generals, who each have a strong connection to one of the three members of Team Urameshi with a demonic heritage. Each King suffered a physical loss to obtain their enlightenment; some are more pessimistic than others, but all have gained enough patience to avoid fighting one another, knowing that if one fought another to the death, the third would strike at the moment of weakness and be the remaining King. This situation lead to a 500 year stalemate that lasted until Raizen's death, upon which his descendant Yusuke called a tournament that caused them to disband their