Sonic.exe is almost identical to the original Sonic, but there are some noticeable differences. His fur is darker and he wears black and has either red or gray shoes. When he smiles, his mouth unnaturally widens and reveals yellow, fanged teeth (Sir JC explained that the yellow color is not due to tooth decay, but a side effect from when he was created). His eyes are pitch black with two glowing red dots as irises and very small pupils. Interestingly, Exe always seems to have blood under his eyes, even when he's not crying. This is actually a major birthmark, as his eyes hurt greatly when he was born. Apart from the blood, there's also a faint but visible rash under his eyes from crying an excessive amount of blood.