The Fallen used to be a race called the Eliksni. They were visited by the traveler before our time. When the darkness found the Eliksni, the traveler abandoned them, fleeing in fear. The traveler then found humanity. When the darkness eventually caught up with it again, instead of fleeing again, the traveler decided to stand it's ground and fight back against the darkness, fighting to protect humanity. The Fallen hate the human race for this reason. The traveler chose to protect us, but abandoned them. The Eliksni became obsessed with the traveler. Their civilization was decimated by the darkness, and in the wake of their own 'collapse' (which they call 'the whirlwind') they set out to find the traveler once more, hoping to bring salvation to their people. Their obsession with finding it, and their pilgrimage across the stars, has lead to the downfall of their race, eventually becoming the nomadic pirates we now know as The Fallen.