The Ancients are a race of warrior-types who favour melee and bladed weapons. they are brutal and cold, maybe even arrogant. The Ancients got wiped out when a supernatural army was unleashed, leaving one survivor. The Wise One. It is possible that Etrius,Beecher,Lloydand Boomer are descendants of the Ancients, Lloyd especially, for his like of using swords.
This is about the Ancients locked in war with eachother, the leaders not knowing that a Psychic force was springing up within some. Some of these Psychics became corrupted and unleashed an army of demons, wiping out their race.