Whether they die naturally or exhaust their vitality, they will all be reborn.
After rebirth, the Dragon Beast King is no longer a Dragon Beast but transforms into the chosen gender after reaching adulthood. In other words, whatever gender they choose as a Dragon Beast King, that will be their gender after reincarnation.
Because Dragon Beast Kings are rare, there aren't many of them. From ancient times to the present, there probably haven't been more than twenty.
These twenty still live on Earth, scattered around the world. Since they are all kings of the Dragon Beast World, they all naturally regard themselves as the best, unwilling to concede to one another, and thus have no contact with each other.
The reborn Dragon Beast King can no longer be considered a Dragon Beast. They physically have no difference from humans and can no longer transform into Dragon Beasts. They exist between humans and Dragon Beasts, possessing immortality, eternally youthful, living forever.
