Worn all throughout the galaxy, Elitra has become as common-place as Zenyths, wherever you find one, you will find the other. Elitra are used for many purposes, chief among them is interfacing with all kinds of technology. While many pieces of of electronics still have manual interfaces, it is faster and easier to interface with them neurologically, allowing for rapid input and output of the machine.
On a scale from Pilots from Titanfall to Space Marines from Warhammer 40k, Elitra are more pilots and less space marine. However, some Elitra do have Gravity Sheilds, which makes them very-well protected.
More is writen and ready, I just havent gotten it into the website yet (I got a burst of motivation to try my hand at drawing a Zenyth :-P)