Carlo (The Vampires of Venice)

 was the steward to Rosanna Calvierri and Francesco during the time of the attempted re-appearance of the plague in Venice in 1850. His name was identified as Carlo by Rosanna when Rory Williams and Amy Pond tried to infiltrate the Calvierri manor to find out what was happening. He also witnessed the death of Isabella at the hands of the Saturnynian males who were in the water. After Francesco and Rosanna deaths, it is unknown what happened to him.