Zarakharn I is the ruler of Khriza at the time of my first book. He is 187 years old. Dragons live to just under 200 years. So he's old. But he has a life crystal that makes it so he never ages, and can't be killed except by destroying said crystal, in which case he will die immediately. But the point is, his reign is far from at an end. Nat Arrissa is 100 years old. He's middle aged with one adult son who has two small children. His other two children are 32 and 20. Zarakharn became ruler at no older than sixty, assuming the throne from his father who had died. Angriad II died of natural causes. Nat's father saw his reign. The trouble is, I want Nat and his younger brother Ginzaekh (the protagonist's father) to be small children when Angriad is still reigning. This doesn't work if Nat is 100. So I'll have to stretch something. Where should I modify the characters' ages? Nat's children must be, respectively, younger than 32, 32, and just old enough to have two children. One is going to be an infant. if necessary I can drop one of them so Nat only has one grandchild. So Nat doesn't necessarily have to be 100, just old enough to have a child a few years older than 40. Zarakharn must be in his prime. That's the state his body is at the time of the creation of his life crystal, which is after his father's death, when the existence of magic was revealed to him. But he can't be too young, so he must be older than fifty. So an age range between 50 and 70ish. Angriad's age is flexible as long as he's old enough to die of natural causes by the time Zarakharn assumes the throne. When this is all worked out he'll have a definite age. So, what should I change to make this fit? If necessary, I can have Zarakharn reign for all of Nat's lifetime up to that point, but I'd prefer to have Angriad reign for some of it.