Lady Farina was the Coordinator of the Celestial Intervention Agency at the time when the Eleven escaped from Gallifrey. She was a supporter of Romana II's reforms of the Time Lord Academy at the time.
She fell for the Eleven's deception to interrogate Kiani rather than track the Eleven through the capitol. The Eleven used the Sash of Rassilon to freeze her and then used the mind probe to extract the codes he needed from her mind. (AUDIO: The Eleven)