The Arcanians were the personal bodyguards of Gruul, himself an Arcanian, throughout the War of Humanity. Gruul and his Arcanian entourage led the forces, known as the Mercenaries of Arn, hired by the merchant-lords of Prospero.
Arcanians are very similar to Trolls, in that both are giant beings, the latter of which are the offspring of human females and Arcanian males.