Thread:LostGod2000/@comment-27729149-20150120222901/@comment-1762629-20150131231026

There's a firm difference between being irredeemable, and being a Complete Monster. To become "irredeemable," in general one must cross the Moral Event Horizon. Unless said crossing is exceptionally brutal in nature, a single crossing cannot automatically warrant said crosser becoming a Monster.

As for the Monsters themselves, they have to all at once meet several criteria to apply for even the most basic form of this trope.

They must never be able to redeem themselves in any circumstance, not even potentially.

They have to be sufficiently heinous. One has to be incredibly evil to become a Complete Monster, both by the standards of the work and in general. A single rape or murder isn't going to do as such.

They must be wholly without mitigating qualities, hence "Complete" Monster. This means no valid Freudian Excuse (one can become a Monster if their excuse doesn't hold any water, take Koba and Lotso), valid moral agency (they must have full capacity to make their own choices- elemental forces of evils cannot apply because they are forced to be what they are, and predatory animals can't count unless they have been anthropomorphized to the extent where their bestial nature no longer impedes them), be played seriously at all times (if the villain is humorous, it must be black comedy at worst, and even that can mitigate a villain's status if they're being played for parody), and be generally feared or hated by almost everyone in the story, hero or villain.

They must have no redeeming qualities, at all.

For Fallen Hana and Regime!Superman, they have no redeeming qualities, but fail the other criteria for one reason or another, be it not be sufficiently heinous or the like.