Definitely one of the stranger looking of the cyborg Strogg race, Brains are almost entirely mechanical, and come equipped with an energy shield that protects them from head-on attacks. When they get close enough, Brains will lash out with flaying tentacles that can rip you apart.
The Brain class appears to serve some type of scientist function within Strogg society, as they are often seen around research facilities, mostly involving medical research. Paradoxically, they do not appear to have a cranium, at least in the orthodox location, as a binocular-like optical apparatus is the only thing they have for a head.
When the Brain's chest is open, its armor is turned off.