Kay
Lizardlike humanoids with dense scales and white pupil-less eyes. Vibrant veins glow from beneath the scales. They act as a hivemind, with different colors, in order of apparent ascending rank: Green Red Yellow Purple ?White?
The coloration of their veins correspond to the colors of nearby Kay, with lesser Kay (like the green) possessing a combination of color of the nearby higher ranking Kay.
The green Kay are the common breed, the lowliest of their order. They are the grunts and foot-soldiers.
The red Kay are less common, one step up from their green brethren. They fulfill the low-level officers, watching over the lesser green Kay.
The yellow Kay are the support caste of the Kay. They always remain behind the bulwark of Kay lines, granting the troops power. 1)
The purple Kay are above the previously mentioned. Not much has been revealed about them, other than their ability to use magic and their influence over the red and green Kay at the least.
The white Kay have only been hinted at.