"Again, forget the idea of little people in there." -Milly explaining television to Pinky[src]
Milly is the Fireside Girl with curly brown hair, blue eyes, freckles, and a yellow bow (not always completely visible). Her uniform has a red collar and a red circular pattern on the sleeves and the bottom.
She is also the only Fireside Girl that is playable in Game Smash.
She has 53 Help Thy Neighbor Patches, because she went back one afternoon when everyone else went home. This has yet to be seen on camera. ("Isabella and the Temple of Sap")
She is the only Fireside Girl with black shoes; the others have red shoes, varying a little bit in appearance.
Her first speaking role was Raging Bully, where she passes out fliers for the "Brawl at the Mall".