One of the most populous drow civilizations, their capital city, Sia'Peiran, from where comes the name, was the third largest drow city, with about 90.000 inhabitants during the Middle Age of Human Dominion, and a total population of Sia'Peirans of around 310.000 drow.
The Sia'Peiran were a very matriarchal society, in which with the passage of centuries, the males were more and more limited to private areas of society.
Some characteristic features of their clothing are the large robes they use that cover them almost completely, especially when they travel to the surface, and that the males are commanded to always use in public places, robes normally of yellow, orange and red colours, as well the use of sometimes green and light-blue colours, among others.
Despite their rejection of the Islamic religion of their human neighbors, the exchanges of knowledge and ideas have been important.
They were faced in wars several times by the Negeémi drows from the city-state of Negeémiliel.