Amelia, Bobelia, Ophelia, Cordelia and Madge are the five, snake-like hairs on Celia Mae's head. They are always by Celia's side. When she's angry, they're angry, when she's relaxed, they're relaxed. After the accident at Harryhausen's, and Celia wore a cone on her head, all of them also got their own cones.
Amelia, Bobelia, Ophelia, Cordelia and Madge are five purple snakes that live on top of Celia's head, acting as part of her hair.