Etherian is a combined gender element from the element system. It is combination of the xenine element, alterian (spirit) and the undefined element, ventulian (air), and is represented by the element of the ether. One whose gender element is a combination of xenine and undefined would be etherian. The noun form of the word is etheri (ex: I am etheri).
History
Etherian was first known to be coined on January 14, 2018[1], along with the flag, but it was likely coined earlier than that on a Google spreadsheet[2].
Flag
The flag's colors are lilac and blue- representing the ether- with a diamond in the center, representing two triangles together.