At first glance, one might say that Bliss is all good and Gloom is the evil one, though nothing could be further from the truth. Bliss and Gloom are very much like the twin forces of Light and Dark, Life and Death, Movement and Stillness; polar opposites, yet incapable of existing without the other.
Though mysterious and unbiased as the Origin is, it still has an elementary drive to achieve balance in all. The struggle between Bliss and Gloom can leave much of Cerebria in upheaval, tipping the sensitive scales of the Identity dominantly to one side, threatening the twin forces to lose the spark of their counterpart and with it, their own self.
And so, to protect Cerebria and all in it, the Origin dreamed up two powerful keepers of Balance to ensure the eternal stability of the Inside World.