Mephiles the Dark is one of the primary antagonists in Sonic the Hedgehog (2006). He is the malevolent conscience, mind and will of the sun god Solaris. Mephiles was born during the Solaris Project when the experiments on Solaris split him into Mephiles and Iblis. After his birth, Mephiles was sealed inside the Scepter of Darkness by Shadow the Hedgehog, but was freed ten years later during a skirmish between Shadow, Rouge and Dr. Eggman.

After his release, Mephiles orchestrated a centuries-long plan to release Iblis from Princess Elise and rejoin with it, which succeeded when he killed Sonic the Hedgehog. He then re-merged with Iblis, remaking Solaris, but was defeated by Sonic, Shadow and Silver, and subsequently erased from existence.

If you like to voice act as Mephiles, Dan Green was the Voice Actor of Mephiles The Dark. Here's an example... https://www.youtube.com/watch?v=IOcR15Kb9WQ