Millie is an echidna who lives in a stylish little burrow beneath Millennium Park. Named for the new millennium, she personifies Sydney's hope and optimism at the dawning of the year 2000. A very hip and modern young woman, she's a whiz with new technology — if you want to know what's new and cool, just ask Millie. A natural teacher and the undisputed brains of the mascot trio, Millie is always taking notes and coming up with creative ideas. While at first you might think that Millie is a very serious young insect-eater, she also likes to have fun and loves sport. With her strong muscular body and sharp mind, she excels at anything that involves strategy and accuracy, particularly archery, gymnastics and fencing. Millie's greatest dream is to build a more peaceful world by educating people through sport.

About the echidna
With its bristling spines and long, pointed snout, the echidna, or "spiny anteater", is found across most of Australia. Solitary by nature, the echidna lives in an underground burrow, using its long, sticky tongue — which it can extend up to 18 centimetres — to feed on ants and termites. Along with the platypus, the echidna belongs to one of the rarest and most bizarre animal subclasses in the world, the monotremes, or egg-laying mammals.

After mating, the female echidna lays a single egg which she carries in a pouch on her belly. After 10 days the egg hatches, with the baby echidna remaining in its mother's pouch until it is six weeks old. After emerging from the pouch the baby stays with its mother until it can survive in the bush alone.