In "Sun, Moon, Dust" by Ursula Vernon, there are three warriors who have lived for many years inside a sword. When the sword is passed down to a young boy as an inheritance, the warriors are surprised to discover that he does not even have the spark of a desire for power and conquest. Dust is very upset, Sun is content to wait in the sword until the next to bear it with intent for war comes along, while Moon rediscovers agriculture, choosing to remain outside of the sword to farm the land together with Allpa.
Sun removed Moon's gem from the sword when he decided to tarry outside of it. Is Moon's decision permanent? Will Moon age while he's outside of the sword? Will he die, eventually? (Is there enough information in this story to tell?)
I wonder about this, because if Moon gives up his (health and) longevity in order to spend time with Allpa, his story becomes that much more touching.