Super Robot Wars Original Generation: Divine Wars - Season 1

To defend humanity from extraterrestrial threats, the government develops humanoid mecha called Personal Troopers. Aerogaters, members of an alien race, attack an Earth ship sent to investigate their presence in the far reaches of space, but a third and secret enemy surfaces--The Divine Crusaders. They destroy the Aerogater delegation, then turn on the Earth forces. What is the real purpose of the newly revealed enemy, and who is leading it?