They had to learn to be warriors and comrades. That’s why they’re required to attend the academies on the seven outposts surrounding planet Earth. For there they learn to fight, they learn their craft, and they’re called Watchers until they graduate.
For all Watchers dream of graduation day when they’re eligible to begin an eternity of service… mostly in the military. After all they’re bound to protect humans against soldiers of darkness—demons—who are just as bound to destroy them.