An assistant and devotee at Mr. Pendletons Satanist mansion. He assists the Slasher in tracking Leonard Wilkes, the nuclear plant manager, and is the only follower spared when the Slasher slaughters Pendletons group.
Pendleton commands the cult mansion while Marvin serves as his loyal subordinate.
Marvin acts as the cult's operative specifically locating Leonard for destruction.
Marvin's cult operations directly oppose Jane's mission to neutralize the threat.
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