Evelina (The Fires of Pompeii)

Caecilia Evelina, daughter of marble merchant Lucius Caecilius Iucundus and his wife, Metella, was a young Roman woman living in Pompeii on the eve of its destruction.

Evelina showed some precognitive abilities, and so was promised to the Sibylline Sisterhood, a local cult of oracles influenced by the alien Pyroviles, as a consecrated priestess.

Like her parents and brother, Quintus, Evelina was spared from Pompeii's destruction by the Tenth Doctor's timely intervention.

Her psychic abilities vanished with the Pyroviles (the Doctor explained that her ability to see the future was due to Mount Vesuvius' eruption being so powerful that it cracked open a rift in time for a second and the effects echoed backward through time), so she was free to be an ordinary young woman once more and date, to her father's consternation. (DW: The Fires of Pompeii)

Behind the scenes

 * The Caecilius family (Caecilius, Metella and Quintus) were based upon characters used in the Cambridge Latin Course textbooks (Book 1), who were in turn based on actual historical characters, but Evelina was invented by James Moran so that she could be a member of the Sibylline Sisterhood.