All Avataric beings draw their talents and powers from the same pool - whether the Avatar is Light or Dark is chance...but is directly affected by the human moral identity of the being.
While these beings can sense the existence of their moral opponent, they are unable to detect or identify them outside of close physical proximity.
The start of the avataric line is the Alpha - a female who lived before the Flood and whose story was lost with the destruction of the Royal Library of Alexandria. The Alpha spawned the first pair of Avatara, manifestations of some higher power or House; one is Light and the other Dark. Giving birth to a new Avatar leaves the mother barren and insane / ill. Often the direct line passer of the avataric mantle commits suicide. Should they remain alive - their offspring children as well as their respective offspring are called Vectori, beings with Avataric Blood who are not themselves Avatara, and who thus become generationally further removed from an Avatar in the bloodline. While Vectori cannot become Avatara, as that mantle is only conveyed upon birth, they can still exhibit some minor powers and often show signs of insanity.
An Omega is a female avatar. She is also, the end of her line, and will not produce offspring.
When Avataric and human natures coincide, an Avatar will work well towards the goal of his / her House.The overarching theory depicts the battle between good and evil and the struggle between free will and destiny...