Origin
Guido was born in Midian. However, he didn’t fit in with the rest of the Nightbreed, because of his looks. He was too normal-looking.
Outside of Midian, Guido used to be a car mechanic under the guidance of mister Deluca, until Deluca made a pass at him. Disgusted, Guido stormed off. The next day, having calmed, he returned to Deluca, discovering Deluca had killed himself the night before. Saddened, he returned to Midian, only to have it destroyed by invading police forces who had followed Aaron Boone to his hiding place.