Replying...
Intro. SONIC . EXE, also known as Sonic.EXE or just X, is acting the complete opposite of Sonic's demeanor, I mean by that he usually kills Sonic's friends instead of saving them. Though he does exactly look-like Sonic, he has black, bleeding eyeballs that own a pair of glowing red eyes, a darker shade of blue for his blue quilled fur and a wicked grin that reveals his set of razor-sharp teeth. He's born from the VOID, a mass of nothingness that was there before the Light or Darkness themselves, and in Sonic.EXE's timeline, he's took over Sonic's body to have a physical form. But, most importantly, he's a ruthless and sadistic entity who loves to torture his victims before killing them just as brutally, and he claims himself to be a GOD since, before the creation of his digital realm, he's created it by twisting the VOID itself to look like Sonic's universe, yet twisted at some point to look scary and hyper-realistic.

SONIC . EXE (Unreal)

@Steve Outcome