Aristoteles (2nd definition)

Eight life forms that came from other celestial bodies. They are the strongest existences from their planets, and each of them are capable of eliminating everything alive on this world. The term "Aristoteles" is given by people, even if they don't have a concept similar to name. Beside occasional fights among themselves, they live pretty freely. Some of them assimilated a concept called "intelligence" from the life form of this planet, and a few even tried to contact humanity.

After the relay of their home planets and messenger of Aristoteles Type Saturn was destroyed, they entered the final combat with humanity.