Question about the royal hair

[BarrileteCosmico]

If Returned cannot have children, how does the royal family have "Returned blood"?

[Oudeis he/him]

I think it's revealed in the text, and if not it's certainly in the annotations, that there is some trick to it. A Returned can sire a child, it's just not as easy as it is for humans.

[gjustice99 she/her]

Because somehow a returned had a kid and that kid became the second ruler of Idris (after its mother).