El Jefe

El Jefe was a renegade member of a mythical race from the previous universe.

History
For four hundred years, El Jefe worked as a minor functionary for the Lords Temporal, the most important race in the Clockworks. He helped out in the Monkey God crisis by pressing buttons and moving dials. Bored of his insignificant life among his own people, Jefe stole a wordship and ran away to pursue a life of adventures.

While he had been aware of her for a while, Jefe first met Iris Wildthyme in a back alley on Hyspero. Iris would later pretend to have met Jefe in Paris during the revolution. (PROSE: First Meetings)

Jefe visited the Witch's Tipple in Hertfordshire for a 1973 Christmas party and waltzed with Iris Wildthyme. (PROSE: Iris at the V&A)

Appearance
Iris once described Jefe as a "white-haired gollum... comfortable only in the shadows and within secret, quiet spaces". He used a cane. (PROSE: First Meetings)

Panda thought that Jefe looked like a dandy. Jefe was an older grey-haired man who wore purple silk capes. (PROSE: Iris at the V&A)

Behind the scenes

 * El Jefe appears in Blair Bidmead's Señor 105 novel By the Time I Get to Venus. The novel establishes that he is one of a race of "trans-temporal oppressors," and that "El Jefe" is not his actual name, but the result of Señor 105's translation technology (obviously set to Spanish) interpreting Theo Possible's demeaning nickname for him. Blair Bidmead's later short story Significant Others, published in Obverse Books' A Target For Tommy, establishes that the First Doctor remembers the events of the novel from El Jefe's point of view.
 * In Stuart Douglas' When Iris Met Billy, a reprinted version of First Meetings published in A Second Target for Tommy, El Jefe is, simply, the First Doctor.