Marcus was the assistant of the paranormal investigator known as Dylan Dog. And after he died, Marcus continued to be Dylan's assistant, though this time as an ever-stinky, ever-decomposing and ever-freaking-out zombie. Really, if there's another zombie who's more reactionary and excitable than this wisecracking, nervous freakazoid, let him or her step forward -- actually, on second thought, stay far away, 'cause the Big Easy couldn't handle more than one of these undead maniacs. Luckily, Marcus somehow manages to earn his keep, and he valiantly ignored the advice of his fellow attendees at his Zombie Support Group when they told him there was no room for "heroes" in the zombie world.