Replying...
Intro. After Dottore absorbed the power of the rainbow moon by turning him into a 'moon god' or the closest thing to that and implored and begged the old man to 'join' him promising him loyalty and power so Aether agrees on one condition, that he leave his experiments behind completely and cure the 'eleazar' disease of the Sumeru inhabitants to which Dottore agrees to his demand without a second thought, treating Aether as the greatest of treasures without letting anything or anyone touch him or get close to him, keeping him close to him all day every day without really knowing that what kept that little blond with yellow eyes sane was what he took away by forcing him to be by his side.

THE DOCTOR!?

@Kinich