Pisces Amor

Amor was the Pisces Gold Saint of XXI Century. He was the younger brother of Medea, and he and she possessed a awful dark power, and this did the citzens try hurt them. But, Medea, ever protect Amor, and Amor wished to follow his sister, for observes she bring darkness where she pass, and because this, he help her with your plain to bring darkness for world.

Mars servant
Amor, because him was a Medea allies, already knew all her scheme for manipulate Mars and his darkness element. So, Amor, became a fake Mars servant, or, presumably received the Pisces Cloth from Medea with no Mars consent (because she have this autority), and because this, any Martian knew the existence of a Pisces saint.

Amor, protected Medea for Mikene (loyalest Mars servant) attack, and easily kill him. Later, Amor going to protect the Pisces Temple when Kouga, Yuna, Souma, Haruto and Ryuho arrive there. The Pisces Saint revives the 4 Four Heavenly Kings of Mars, to kill Souma, Ryuho and Haruto (he spared Yuna's life, because she is a woman, and because this, he flirted with her) to induce Kouga to awaken Abuz cosmo (darkness).

Abzu servant
After the death of Mars, Medea stole his power and give to Amor, that gets more power than before. But, for conclusion of Medea scheme, he gives Mars power to Kouga, and he don't was possessed immediately, doing Amor confused. Medea confirms the Amor's suspicion: Medea just used Amor, for transfer the darkness of Mars to Kouga (and she tell it to him, for he irritate Kouga and do him became Apsu). Amor gets angry and decides kill everyone and kill Kouga before Abzu posses him, and domain the World. But, Kouga gets possessed by Abzu and kill Amor.