Unlimited Blade Works Gilgamesh is kind of odd, because he crosses the line into flat-out villainy and is distinctly less kingly than any of his other portrayals.
I can't really see, for example,
Fate/Zero or
Fate route's Gilgamesh just punching a hole in a child's chest to rip out their heart. Not because it's particularly evil, but it just really doesn't fit with his more consistent "I
could totally kill you all now, but the building is on fire and the ashes might dirty me. So you escape this time." portrayal.
Or his attempt to kill most of the world's population so it can be 'worthy' of him, which makes no goddamn sense because he notes several times that the ugliness of the modern world is entertaining and that no matter what state it's in, it remains his garden that he won't allow to be destroyed. Hell, in
Heaven's Feel he gets pissed as the Shadow because it killed a few dozen of 'his' subjects for no reason.
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