Sonic.EXE looks similar to Sonic, but with several noticeable differences. His fur and quills are a darker blue, less smooth, and more unkempt. His skin is also paler, with a black color fading into his forearms, hands, forelegs, and feet. He is sometimes seen to have claws, which are often depicted as either black or purple. He has a wide mouth, and his teeth are fanged and yellow, a side effect of when his body was first made. He has pitch black eyes, usually accompanied by red irises, although this can vary. His most iconic trait is the blood flowing out of his eyes, a result of a birthmark that constantly pains his eyes. It’s unknown why he has this trait, but it has left rashes under his eyes.