Drusilla was a Roman slave on the planet 892-IV, and the property of the Imperial Proconsul Claudius Marcus. The attractive female humanoid was apparently well-adjusted to her duty as the provider of entertainment in her master's household.
In 2268, Claudius Marcus hosted an alien guest/prisoner, Captain James T. Kirk. On the eve of his scheduled execution, Drusilla was ordered to consider herself Kirk's slave and property for the night. (TOS: "Bread and Circuses")
Drusilla was played by actress Lois Jewell.