Amazonia

Amazonia was the Earth delegate to Peladon when it applied for membership in the Galactic Federation. However, she was delayed en route, and did not arrive until after the situation on Peladon had been resolved by the Third Doctor and Jo Grant. (TV: The Curse of Peladon)

In 3950, Amazonia was succeeded by Mavic Chen as the Guardian of the Solar System. (PROSE: Legacy; AUDIO: Neverland)

Behind the scenes

 * Amazonia is never referred to by name in the on-screen dialogue; her name is given only in the closing credits.
 * Amazonia is also unnamed in Brian Hayles's novelisation of the story, being referred to as simply "the lady Earth Delegate" and "Madam Chairman".