By way of making reparations for all the tempered lives that they had taken over the years, the Scions/ex-Scions offer their bodies to aid in tribal repopulation efforts.

[…]

You know that sidequest chain where the WOL helps the Ondo Cups matriarch give birth more comfortably? Wouldn’t it just be so much easier and more convenient to find a surrogate who can bear them internally until they’re more developed? And the WOL, as an Au Ra, happens to be the only oviparous member of the Scions, so… yeah.

(Any gender WOL is fine.)