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Ghost hunting team that keeps a nonbeliever named Steve around as an emergency supernatural suppressant.
He waits in the car with a walkie-talkie while the team investigates, and if things break wrong, he's called in. As soon as he enters, everything stops flouting around/trying to kill the hunters, and he rolls his eyes and heads back for the car.
Seriously Steve 100% believes that the hunters are calling him in for either a prank or to make him feel useful, or maybe 'cause their cowards that freak out when a book falls over.
He only stays for the money, and it's the easiest gig ever.
Morgan takes in Steve for his crew; if there's a real haunted house, he needs to test it out, and if it gets too bad, he calls Steve in.