Because of an accident, Lan Yu ended up in the perilous world of Re:Zero. Here, there are wanton Witch Cultists, monsters consumed by hunger, cunning assassins, and high-and-mighty nobles...
He yearns for power. Having awakened an ability like Nasus's Soul Eater from League of Legends, he cannot grow stronger without killing.
He devours every wicked person, no matter how noble their station. If they have committed even the slightest evil, they will face the death he decrees.
He said, "If you're going to start a slaughter, justice is the best banner to raise."
He brings the strongest warriors of two great nations under his command. Amid mountains of corpses and seas of blood, the world calls him the King of Purges. The Hall of Ten Thousand Demons he built with his own hands is known as the burial ground of all demons.
(Mortal's journey, decisive and merciless, no System. A world-hopping story that currently includes Re:Zero and One Piece.)
