Amon is just as willing to help Yuri destroy the forces of evil as he was to help Simon destroy the world but refuses to help anyone unless they prove themselves stronger than him. While he corrupts Simon somewhat he is never able to possess him and eventually is passed on from Simon to the main protagonist Yuri Hyuga, as one of his fusions- (demonic transformed states). Amon is amoral and cares not if he is harming the good or wicked but just craves destruction.
Simon had benevolent goals for his powers as a warlock and chose Amon because the demon was the least inherently evil of his brethren while also being hailed as the fiercest. He is demonic god of destruction and a harbinger of the Apocalypse. The only hell lord to be seen in the previous game Shadow Hearts, Amon is first encountered as the demonic benefactor of the warlock Albert Simon.
