Mephiles The Dark

Ten years before the events of Sonic the Hedgehog (2006), Mephiles was accidentally created during the Solaris Project, under the supervision of the Duke of Soleanna. In one of the project's experiments, Solaris was split into two separate entities: his raw power, Iblis, and his cunning mind, Mephiles. As Mephiles fled in the shape of a thick darkness, he was pursued by Shadow the Hedgehog, who had traveled back in time to discover Mephiles' origins. Shadow sealed Mephiles inside the Scepter of Darkness given to him by the Duke; in the process, Mephiles vowed to remember Shadow and one day take his revenge.

Mephiles is a ruthless, nihilistic sadist that cares only for absolute destruction.

Mephiles is normally seen in one of three forms (excluding his monstrous form, only used in battle). His original form was an amorphous mass of darkness, which emitted an aura and behaved similarly to liquid. After creating a body based on Shadow the Hedgehog, Mephiles took the form of a miscolored but otherwise nearly identical copy of him. Differences included green eyes with slit pupils, a pale-skinned muzzle with no mouth, gray-blue Limiter Rings, and gray-blue wherever Shadow is colored red. Mephiles' third and most iconic form was a crystalline evolution of his Shadow body. It still had no mouth, but now has no nose, or even feet, his legs instead ending in crystalline stubs with a purple aura. Despite his crystalline appearance, his quills and ears are still capable of bending and moving. His arms were also disconnected at the elbows, leaving a gap. His eyes changed color, gaining red sclera with faint stitches and lime green irises, while his quills were bushier and ended in white tips. Although Mephiles lacks a visible mouth, his muzzle still moves and shifts as he speaks. This trait is missing from his appearance in Shadow Generations, where his muzzle always remains still - interestingly, this game is also the first time Mephiles is ever seen blinking, revealing he has eyelids which have the exact color and texture of his crystals, Shadow Generations also changes his design slightly with his crystals glowing a slight purple, and his skin becoming a purplish-black, with his irises being a darker shade of green.