Maggets

Maggets is the name of the strange little worm from the animated stop-motion film Tim Burton's Corpse Bride. He lives inside the dead bride's head, often giving her advice which she often ignors. For example, when Maggets suspects that the charecter Victor is abandoning her, he says inside her head, "I have a bad felling abou that boy. He--" But before he can continue, the Corpse Bride knocks him out of his ear and says, "Go chew someone else's ear for a while."

 Maggets, who is voiced by Enn Reitel, is not necessarilly a main character, but he does join Corpse Bride(voiced by Helena Bonham Carter) and the Widow Spider(voiced by Jane Horrocks) in the song, "Tears to Shed", which is about the Corpse Bride's sadness of being dead.