One of King En's men tells Yoko and Rakushun the story of Enki and how he chose King En.  Enki was abandonded by his parents after their town was destroyed by their emporer and they couldn't keep him anymore.  He was rescued by a nyokai since he was a taika that had been born in Wo, Japan.  When he became aware of En's fate he still swore to never select a king because of the horrible things they do.  He went back through a shoku and eventually me the man who would be King En.  After watching him and his actions he decided to pledge himself to him and choose him as king.  This story is told to Yoko so that she can see the ways that kings and queens are chosen in the Twelve Kingdoms.