Nothing is known about how Emilio looked when he was alive. As a ghost, Emilio is little more then a pair of floating arms framing a ragged apron, topped off with his signature chef hat and his large handle bar mustache. Lastly, his ghost is always seen holding a large meat cleaver
Following his death, Emilio's spirit remained on earth and unable to move on, due to unresolved issues. During Dr. Zorba's travels around the world, he met and captured Emilio, his wife and her lover in Italy and imprisoned them in his mansion.
In the mansion, Emilio is shown several times to catch his wife kissing her lover, and to then hack her with his meat cleaver; suggesting that the ghosts of Emilio and his wife are reliving the moment when Emilio killed her over and over.
When Dr. Zorba was murdered and became the twelfth ghost, Cyrus Zorba and his family moved into the mansion. One day, when Emilio catches his wife with her lover in the kitchen, he wrecks the place by pouring milk and flour everywhere. Emilio then throws a meat cleaver at the wall, narrowly missing Cyrus's head.
Emilio and the other eleven ghosts presumably crossed over when Benjamin Rush died and became the thirteenth ghost.