They were humanoid, but their bodies were mutable; as their brains were moved to a less vulnerable location, their heads appeared flattened. They wore bulky, elegantly-decorated cyborg exoskeletons or power-suits covered in silvery armour with spiny crests running down the back.
The Rivera Manuscript described soldiers resembling Ashla shock-troops attacking the Homeworld at the start of the War, but there was no instance in documented posthuman history where shock-troops could have done this. Upon seeing the troops, the manuscript's narrator commented, "I don't think I've faced such a beautiful enemy, or such a dangerous one." (PROSE: The Book of the War)