Chancellor Jerastra was the President's second in command.
She reported to Padrac that the President had gone missing after a diplomatic mission to the Monan Host. She presided over a council session which told of Gallifrey's doom. She wasn't easily persuaded by Padrac's observations.
The Presidential Aide managed to contact her, but before they could act against Padrac, Jerasta and the occupants of the Presidential TARDIS were killed by Caleera. (AUDIO: Songs of Love)