Cameca

Cameca was an elderly female Aztec in the 15th century. The Doctor unwittingly proposed to her when he shared cocoa with her. She later helped the Doctor and his companions find the secret entrance to the temple, despite knowing that 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. (DW: The Aztecs)