Inca
Mama Quilla
The Inca moon goddess, keeper of the calendar, whose tears were said to be silver.
Mama Quilla (also written Mama Killa) was the moon in the religion of the Inca, who ruled much of the Andes in South America about five hundred years ago. She was honoured as a protector of the calendar, because the Inca marked their months and festivals by the moon.
Silver was sometimes called "the tears of the moon". In our story the moon is a gentle, worried visitor, and her tears are invented to suit the school.