Lloyd Ventrix, also known as Mojo, was an ex-con who acquired a suit that allowed him to turn invisible.
Lloyd Ventrix was a robber who was arrested, and his ex-wife Helen had a restraining order issued. He wasn't allowed within one-hundred feet of either her or his daughter Kimberly. Ventrix, however, very much loved Kimberly and felt he answered to a higher power than the law, and as such was not going to let a piece of paper stop him.
After being paroled and finding work with Sam Giddell as an errand boy, Ventrix stole samples of an experimental plastic, which bent light instead of absorbing it when an electrical current was applied to it. While the material was able to make the plastic invisible, one of its flaws was that it was toxic to both the mind and body. Ventrix fashioned a full-body suit out of the material, and used it to acquire both the means to steal anything without detection and the ability to visit his daughter without being caught. Using the name "Mojo", Ventrix became Kimberly's "invisible friend".
Though the suit prevented Ventrix from visible detection, he could still be heard and physically interacted with. Robbing a jewel exposition in Gotham City, he attracted the attention of Batman, who eventually discovered the link between the material, Giddell, and the Ventrixes.
Meanwhile, Ventrix kidnapped his daughter after learning Helen had planned to move from Gotham. Taking her to an abandoned drive-in theater, Ventrix had planned to escape the city with Kimberly. However, she became hesitant, and attempted to flee when Ventrix revealed his identity to her. Batman arrived, and a skirmish ensued in which Kimberly escaped back to her mother. Ventrix attempted to flee in his invisible car, but Batman held on and the chase eventually led them to a rooftop with a water tower. In a crazed fury, Ventrix began beating Batman severely and ignored his pleas to remove the suit before it poisoned him fatally. Finally, Batman punctured the nearby water tower, and Ventrix was revealed by the cascading liquid. Batman quickly apprehended Ventrix and he was sent back to prison.
Equipment and Abilities
Lloyd Ventrix had no metahuman abilities. His only pieces of equipment were a suit fashioned from an experimental plastic that, when electrically charged, bent light instead of absorbing it, a car covered in the same plastic and equipped with a device to electrically charge it, and a briefcase presumably covered in the material. This allowed the suit (and its contents) to become invisible, thus making Ventrix something of a formidable foe for Batman. When charged, however, the plastic became toxic to both the body and the mind. Ventrix was a fairly skilled pickpocket as he was able to remove the sidearms of several guards without being detected.