These ugly devils are the engineered soldier-caste of the Ghast Empire, and are larger and fiercer than their smaller, more-disposable counterparts. In terms of witless thuggery and stupid obedience, the praetorian has the edge on the drone, which it will often requisition for menial tasks, mine-clearance and breakfast.
These vicious animals will usually fight to the death, often with support from biotanks and artillery. The praetorian is one of the most ferocious specimens in the galaxy, and if given a suitably terminal dressing-down, can be mounted as an excellent hat-stand.