Little girl (Dead Man Walking)

Faith was a psychic and ageless Tarot card reader.

Biography
During 1479, Faith died and was resurrected by the Resurrection Gauntlet and defeated Duroc. Ever since that point, she has not aged and is presumably immortal until her energy runs out(although since she has lived for over 400 years it is unknown if her energy started to dissapate like Owen's did).

Around 1897, she approached Jack Harkness in Cardiff to foretell his future. She told him that he would see two new centuries with Torchwood Three before once more meeting the Doctor. (TW: Fragments, DW: Utopia)

In 2008, Jack sought her out for advice on finding the second resurrection gauntlet. Despite the passage of more than a hundred ten years, the girl appeared to have not aged. She cryptically told Jack where to find the gauntlet and Jack left to get it, but not before she unsuccessfully warned him against using the gauntlet. (TW: Dead Man Walking)

Behind the scenes

 * It is hinted this girl may actually be Faith, the previous victim of the resurrection gauntlet, who battled Death to a standstill in Cardiff in 1479. This is supported by her knowledge of the glove and her apparent agelessness. Though she appears human, her true nature remains unknown. Jack's encounter with her as he sought the gauntlet suggests an ongoing relationship with her beyond the two encounters chronicled thus far.