Trefusis

Trefusis
Species:	Human
Job:	Prison guard
Affiliated with:	Disciples of Saxon, The Master
Place of origin:	Earth
First appearance:	Last of the Time Lords
Appearances:	TV: The End of Time
Main actor:	Sylvia Seymour
Other actors:	Tracie Simpson

Miss Trefusis was head prison guard of Broadfell Prison, which held Lucy Saxon, as well as a member of a cult that worshipped Harold Saxon. (TV: The End of Time)

Trefusis knew about Harold Saxon and was sent to collect his ring. (TV: Last of the Time Lords) The governor, several guards and she resurrected the Master. The Master took her life energy, killing her, as well as that of several prison staff. (TV: The End of Time)