From what I've read they're religious fanatics who abhor anyone that isn't their version of 'human' - including Abhumans - and worship Big E as a God...all sounds pretty Templar to me. Not that I'm arguing, I actually don't mind. I will say that, according to the wikia (so an arguable source), not even half the 1st Company can be equipped with terminator armour and are usually assigned as sergeants to 'normal' squads; I assume this means that we're going to be a squad of hardcore veterans then? I'm actually pretty looking forward to this.