Alissa and Ayen

Brother and sister who created AURA (Advanced User Residual Anomaly), originally AUA (Advanced User Anomaly) which is an unexplainable source of energy that can be manipulated by those who are connected to it, otherwise known as Users.

In a dying world devoid of colors, Alissa and Ayen created the Rainbow Particle Accelerator (RPA), which they comedically named due to the machine generating the colors of the rainbow.

The accelerator allows them to do various things not possible beforehand, such as help plant life grow, or purify water.

The accelerator exploded, giving Alissa and Ayen AUA, the ability to control all 8 elements of the RPA and will.

The Syrilth were the result of the explosion as well, killing what's left of humanity.

Additionally, the Ancients were accidentally created by Alissa.

Ayen left into his own dimension.

Alissa sacrificed herself to divide herself into 8 individuals, now known as the Overseers, who had the ability to spread AURA into other individuals, which drove the Syrilth into a prison dimension.

The 8 elements are
 * Red - Forge Fire
 * Yellow - Energy
 * Green - Life
 * Blue - Protection
 * Indigo - Purification
 * Violet - Mind
 * White - Time
 * Black - Space