Mr. Senna is Mr. Gaunt's usual chauffeur driver. Since his very first day of employment, he hasn't missed a day of work. In the second book when Virgil McCreeby ordered Mr. Gaunt to be held hostage, Mr. Senna was abducted and from his position and replaced him with Haddo. At first, Haddo pretended that he was a good friend of Mr. Senna but as Mr. Gaunt saw through the facade, he quickly abandoned it and reveals his true intentions.

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