The Fallen One
The Fallen One was a multi-dimensional entity.
It was “the gestalt consciousness of thousands of the many monsters felled by the Shifter — held together by hatred and vengeance and the all-consuming power of Chaos”. After coalescing in a universe that was ruled by Chaos, the Fallen One lay in wait until a day when it perceived that Jenny Everywhere had disappeared from the Multiverse of her own accord.
It emerged in the form of an oppressive, shapeshifting fog in another universe, in a seaside town where Jenny's friends had congregated to mourn her, intent on destroying Jenny's “defenceless” loved ones in her absence as a way of finally getting its revenge. However, Jenny's companions proved capable of driving back the dark entity almost completely, and it was finally completely dispersed when Jenny returned, literally dropping out of the sky and onto the ‘head’ of the Fallen One. (PROSE: The Disappearance of Jenny Everywhere)