Death opposes life, chaos opposes order, nature opposes force
The rest +++
Nature also opposes death, judging by the Necromancy Guardian, and Barbarians are neutral, which is clearly visible in the tavern. Apparently, the opposition is structured differently: Life, Order, and Nature against Chaos and Death. Since Demans can be equally attributed to both Chaos and Death, it would be logical to place them in one of these factions.