Mr. Janni is a villain who appears in the 1965 film adaptation of Thunderball. Janni is a large man who serves as an henchman for SPECTRE. He is one of Emilio Largo’s top men in the Bahamas, the other being Vargas, which he is rarely seen without. The character is portrayed by Michael Brennan.
While leaving for the Junkanoo festival, Bond opens the door to come face-to-face with Vargas and Janni. Slamming the door shut, he turns to find Volpe holding a gun on him. She lets them in and they take him captive.
As they sit in traffic Bond improvises a distraction by knocking an intoxicated reveler's liquor over the car's interior and igniting it with Volpe's cigarette lighter. He flees the burning vehicle into the Junkanoo crowds, pursued by Volpe and her men. Shot in the ankle, Bond inadvertently leaves a blood trail which leads them to the Kiss Kiss Club, where 007 attempts to mix in with the dancers.
Volpe approaches Bond as he is dancing with another woman. Assuming Volpe is his wife, the woman abruptly leaves, and the pair begin slow-dancing. As they dance another henchmen takes aim at Bond from behind a nearby curtain. Bond notices in time and spins Volpe into the path of the bullet, piercing her spine and killing her instantly. Witnessing the death of their superior, Janni and the remaining thugs flee.
Janni's final fate is unknown. He may have participated in the final skirmish between Largo's remaining soldiers and the American troops sent to combat them; if he was engaged in this conflict, he was almost certainly captured or killed.