It makes sense that the father wanted to unite all the demons. If he had been successful with the unification of the demons by resolving their internal wars and taking charge then he could have pushed for a non-aggression pact, a peace treaty, or started a war with equivalent footing that could have devastated the humans' way of life (i.e. created a state of Mutually-Assured-Destruction. More specifically, once the demons and humans become united under their respective race then neither side has any incentive to initiate a conflict or to dismantle its army for fear of the repercussions).
It would seem that of the current characters Alice is very smart. In the short time that she has been with Lloyd and Eve, she has been able to deduce that LLoyd is the Hero.
Thanks for the Translation.