Who is Father Mueller from A Planet Called Treason and what is their importance?

Ensel is Lanik's father. He rules the land of Mueller, and he is grieved to send his eldest son Lanik away, since he has been groomed since babyhood to be the next king. Dinte, the fraudulent son, eventually deposes Ensel Mueller till Lanik comes and saves the day. Ensel is trapped by Dinte and must always deceive others pretending that he is in full agreement with Dinte's manipulations and machinations, even though he very much does not support them. At the end of the book, Ensel shows the grandness of his character by cooperating with Lanik in reclaiming the power of his land, even though there is a strange plot twist as they accomplish that.