Ketsueki_Hasu
When Aethisia gets to sink her hooves into her wife, Prixia needs to calm down Yiksa by claiming her. I don't know why, but I see those two as a "shared/owned" but mated pair. They have both gone through things in their past. And they are interacting in "this kind" of family together as well. But Yiksa was almost always the one that was "pounding" Prixia if I remember. So... Yiksa should get some equal attention from her and have Prixia "be the one to be there" for her. Not quite official in the beginning, but something that could help develop Prixia as a character for this series. With what you have planned.