The Second Demon [1]

Earlier, when the life forces were separated from the barrier and it shattered, the demons within sensed it at that very instant—an intruder had breached their boundary and stepped into the village.

At once, one of them was dispatched to uncover the identity of the trespasser, or perhaps the group bold enough to accomplish a feat they had believed no human could achieve.

The demon arrived and perched atop a distant roof from where he watched the young boy who had been able to not just break the barrier but had also meticulously separated the villagers' life forces. 

The demon watched Seiya from afar, reporting to the other demons every detail of the situation.

"It's just one person," he said, eyes locked on Seiya. "A mere child no less."