The Elyos is one of the two playable factions in the game. The Elyos hate the Asmodians and want nothing more then to see them dead. The main capital of the Elyos race is Elysea, which spans the southern half of the world, Atreia. Much unlike the Asmodians, the Elyos starting area and cities are very beautiful and "upbeat".
The Elyos are also said to be the more beautiful race and the more lively and vibrant of the races. This could be another reason why the Asmodians hate them. The Elyos serve the 5 Seraphim Lords who guided them to safety when all seemed lost.