A world-ending threat usually requires global cooperation. Pure-hearted heroes act as the ultimate diplomats. Because their virtue is transparent, they naturally bridge ancient divides between warring factions—such as humans, elves, beastkins, and demons. Their harem reflects this unity, serving as a living symbol of a fractured world coming together. The Magic of Absolute Trust
The Evil harem wins, hands down. Against a demon king who will raze the capital in 72 hours, you don't need therapy sessions and trust falls. You need a ruthlessly efficient strike team that follows orders without question. The "Evil" protagonist gets the job done. He saves the world on Sunday and starts his reign of terror on Monday.
Dark heroes tap into forbidden magic systems—necromancy, blood magic, or void energy—that virtuous heroes reject. These magic systems often scale faster and hit harder, providing the raw firepower needed to crush apocalyptic threats.