Sonic.EXE -sonic.EXE-

Sonic.exe looks exactly like his idol, Sonic the Hedgehog, except there are several noticeable differences to his appearance. X's fur and quills are a darker blue and less smooth and more unkept, his skin a sickly pale color, with a black color fading into his forearms, hands, forelegs and feet, symbolizing X's dark matter in a way. His claws are sharp and pitch black (though sometimes they're also a bright purple). X's mouth is often unnaturally wide when he smiles and it's always fanged and yellow (JC explained that the yellow on his teeth is not a result of tooth decay but one of the few side effects when his body was first made)., and his eyes are pitch black, with two glowing red dots as irises with very tiny pupils. For some reason X's seems to always produce blood under his eyes even when he's not actually crying, though this is a major birthmark (when he was born, X's eyes hurt greatly). When X isn't crying blood, one can see a faint but noticeable rash under his eyes from crying so much blood.

X actually has multiple forms, all of them usually resembling Sonic. As Classic Sonic, he looks just like the original Sonic the Hedgehog only with the same dark, bleeding eyes and wide, fanged grin. The Sonic Plushie (which acts as a spy for X) looks like any other ordinary Sonic plush doll, except there are bloodstains under its eyes and if you look closely, you could see a faint red glow within the black pupils.

X's body is merely a shell for the real beast, however. What X truly looks like is a giant shapeless mass of pure Dark Matter, giving him a black and purple thundercloudy appearance, with two glowing red dots for eyes. X's true form can inflict severe damage in contact, and is considered his most dangerous form despite being the weakest. It’s considered the weakest because his defense in said form is the weakest out of all of them, making him receive more pain that he usually would.

X's signature outfit is a purple and black sleeveless, short-legged, skin-tight spandex suit complete with a black fur collar around the neck ending to an emblem of X's own design, resembling a blue demonic smiley face with four large red ribbons shaping an "X". X also wears a black and gold-lined cloak around his waist, supported by a black leather belt with a red "X" as the buckle. X's boots are knee-high and gothic-designed, having 2 belts on the back of each boot, and have purple lights under the heel and sole, signifying X's anti-gravity device made with the boots. His gloves are fingerless having purple lining on the finger holes and the cuffs being large and cuplike, much like the original design of Tails’ glove cuffs, but without the straps Sonic.exe, personality-wise, is considered evil incarnate. X views humanity to be the perfect plaything and desires to one day have it all to himself for eternity, and believes himself to be a god thanks to his reality-controlling powers. X's arrogance and sadism appears to stem from his creative side, so it's possible that he also uses his powers to torture humans just to see what he can do with them, not just because it gives him great pleasure and power over them.

Aside from his insatiable love for humans and his sadistic and creative need to play with them, X also idolizes Sonic the Hedgehog, which inspired X to create a body for himself similar to his idol's and also create a world that has many aspects from Sonic's world, and hopes to one day have Sonic all to himself as he rules over humanity. While X does truly admire Sonic to the point of possible homosexuality and fanaticism, he also shows great disappointment whenever Sonic doesn't act like the Sonic he idolizes.

In addition to X's arrogance, X greatly dislikes God and the Devil, believing that they both are unfit to rule over Humanity (In fact JC stated that the "SEGA 666" on the first Sonic.exe story was X's way of making fun of both God and the Devil).

X also has a rather violent temper if provoked correctly, which can prove to be his undoing. If X doesn't get his way all the time or if the game isn't being played in his favor, X will get uncharacteristically angry. If one were to anger him enough, he would rage quit, but by doing so the resulting damage to his "system" would cause him to go into temporary sleep mode before waking back up. JC believes this fatal flaw of X's to be part of X's connection with the game. If someone were to defeat or at least outsmart X, X will not stop until he either gets even with them or makes them his newest slave.

Even though X loves tormenting humans in the worst way imaginable, he never considered killing one. X abhors death in several ways, believing that a dead human is a waste of a good toy, which is why he steals the souls instead, because the soul is eternal even in death, and X believes if he steals the soul and shapes it into a slave, it will live forever with him. X is also a very good sport most of the time and can be easy to impress, despite being painfully arrogant, as he's shown his admiration to Derek's persistence in stopping him before deciding to steal his soul. X is aware that he's evil, and even admits that he has a very monstrous personality.

X is also known to be extensively manipulative and clever, as he influenced a master programmer to create the game disk, led a cult to believe that he's really a good guy, and has warped the minds of several of his slaves, most notably Tom.