- You may be looking for The Void.
Void was created when Illumina's self-doubt shattered the Precioustone and caused her to split into two separate beings: Void and his good counterpart, Lumina. Void attempted to claim the Precioustones for himself, but was thwarted by the efforts of Lumina's new allies: Sonic the Hedgehog, Amy Rose, Knuckles the Echidna, and Tails. After the nature of his relationship with Lumina was uncovered, the two reunited to become Illumina once more. (StH: #92, CSE)