Christina Madrigal was a Colonial Marine.
She was a veteran of numerous military campaigns, including ones on the Outer Planets and in the Arcturus system. When she was stranded on Mars during the Dalek blockade of the Solar System, she was ordered to go along with Anthony McGuire's expedition to investigate unusual energy readings at the Martian North Pole. She was killed by a rock-snake in the Labyrinth of False Pride. (PROSE: GodEngine)