Wandering through the forest in their carriage late at night, Haruki and his companions were slowly making progress to reach uncharted lands. And while getting there wouldn't have been a problem with Hawthorn's teleportation, getting the entire army showing up there at once would've blared all sirens for both the tribes Haruki was trying to intercept.
This decision to travel on land, while reasonable enough, did possess some weaknesses, one of which happened to be trailing spies keeping watch of Haruki's every moment. Taking advantage of just that, the prince of hell watched through the eyes of his numerous hellspawns prowling through the forest. Like rats and other rodents, they'd transformed themselves to keep an eye on the long file of carriages.
'Keep your eyes on him.' With his throne threatened by the new demon lord of lust, the prince of hell commanded his minions.