Cotton Top is an earth pony filly with a white fluffy mane, blue-grey fur and orange eyes. Cotton Top was seen with a farmer's hat and a bale of hay as her costume. Cotton Top's cutie mark is covered by her hay bale costume, or it could mean that she hasn't obtained her cutie mark yet. Cotton Top's name was given to her due to her white fluffy mane, resembling cotton as cotton is also white and fluffy.
Cotton Top appears in Call of the Cutie of My Little Pony: Friendship is Magic series, when her debut appearance reveals during Rarity's flash back. During the flashback, Cotton Top is seen performing in the school play, wearing a farmer's hat and a hay bale costume. Cotton Top's first appearance was in Call of the Cutie and her last was also Call of the Cutie, meaning she has only appeared in one episode throughout the whole of My Little Pony: Friendship is Magic series.