Solaris

Solaris, also known as Iblis and Mephiles, is the primordial sun god featured in Sonic the Hedgehog game.

Mephiles
Mephiles also known as Mephiles the Dark, is a major villain from the Sonic Series. Originally he was sealed away inside the Scepter of Darkness but during the events of Sonic the Hedgehog, he was released. It was then revealed that he is one half of the sun god Solaris.

Sonic the Hedgehog
He is the mastermind behind the Sonic the Hedgehog game. He was imprisoned 10 years prior to the game by the Duke of Solleana in the Scepter of Darkness. Mephiles was freed when Dr. Eggman attacked Rouge, who was holding the scepter, in the air and dropped it, which caused the scepter to shatter. Mephiles resembles Shadow's form apart for slight color differences. He then manipulated Silver in an attempt to kill Sonic and force Elise to cry, thus releasing Iblis the second half of Solaris in the final chapter of the game. He merges with Iblis and transforms Solaris after impaling Sonic with a energy beam and making Elise cry. After the battle Solaris reverts to a small flame and is blown out by Elise. This erases Solaris from existence.

Personality
Manipulative, cunning, vengeful, and evil. Mephiles is determined to rejoin with Iblis. He has shown displays of sympathy towards Shadow and Silver, but these were merely facades to get the hedgehogs to do what he wanted. He is given to cryptic comments, revealing half-truths to manipulate others. If something stands in his way, Mephiles first tries to convince it to join him. This implies that he knows for a fact he is not powerful enough to face all enemies.

If Mephiles does feel the need to fight, he will do so with stunning wrath and hate. He feels those who get in his way are pathetic and should die. Once defeated, however, he retreats, simmering his vengeful nature once more towards plotting and planning.

Unpredictable and willing to go any length to finish what he starts, Mephiles is truly a villain. Some fans say he is the manifestion of pure evil and hate itself.

Iblis
Iblis also known as Iblis, the flames of disaster, is a major villain from the Sonic Series. Originally he was sealed away inside the Princess Elise but during the events of Sonic the Hedgehog, he was released. It was then revealed that he is one half of the sun god Solaris.