Mira (The Fires of Pompeii)

Soothsayer is a member of the Sibylline Sisterhood that were in Pompeii in 79 CE. She has eyes painted on the back of her hands - a sign of a soothsayer. She was the first of the Sisterhood to see the TARDIS or "Blue Box" that had appeared in a prophecy. She had psychic powers due to breathing in dust from Vesuvius that was converting her into a Pyrovile and could see time thanks to the rift activity there. It is likely that she died during the eruption as it has not been shown otherwise. (DW: The Fires of Pompeii)

Behind the scenes
Actress Karen Gillan would later be announced as the new co-star of Doctor Who alongside Eleventh Doctor Matt Smith beginning in Series 5. Gillan joins an exclusive club of Doctor Who guest stars brought back as main cast, playing different characters (others in this club include Colin Baker, Ian Marter, Peter Purves, Lalla Ward and, if audio dramas are included, David Tennant.)