Ever since Milly was introduced to the toy in the tunnel, she has been obsessed, bouncing around in it with her uncontrollable energy. Milly is sweet, lovable, and trustworthy. She is a vivacious and cheerful girl who spreads that joy to everyone she comes in contact with. When Milly is ready, she will have brain surgery to drain the cyst and implant a drain to drain the excess fluid, giving her the best quality of life.