Millie is a student at Greenwich Private College. She is one of the more knowledgeable people about the mysteries that surround the bushland area, since her mother, grandmother, and great-grandmother have all gone to Greenwich when they were younger. Peppy and popular, she is quick to invite the two sisters into her social group.

As she is very preppy, I imagine her to have a really high pitched voice. But able to still sound serious at times.