The Requiem of An Empress

Different sceneries, different people, and different timelines, but every world in this story is suffering from tantamount incidents. \n\nDemons in pursuit of supremacy,\n\nAngels avowing to return order, \n\nOther species unknowingly thrown in the fray,\n\nAnd humans waging war with each other to quell their greed.\n\nHowever, the presence of one entity will bring about waves of changes. \n\nIs it...