Cameca was an elderly Aztec woman in the 15th century. Because of her age, she spent most of her time in the Garden of Peace and was often consulted by others for her wisdom.
The First Doctor, not understanding the customs of the Aztec empire at the time, unwittingly proposed to Cameca when he shared cocoa with her. She later helped the Doctor and his companions find the secret entrance to the temple, despite knowing it would allow her beloved to leave her. She gave the Doctor her brooch before they parted ways, which he took with him as he entered the TARDIS. (TV: The Aztecs)