TVM have a wide range of animals, beasts, characters and fools. Normally one is out dancing at one time but occasionally there are two or three characters joining (and distracting) the side.
The characters of the characters depend on who is in them. In Thames Valley a character or beast does not 'belong' to one dancer - the beasts at least are moveable beasts.
On foreign trips it has been known that the side has been accompanied by two goats who vie for attention and try to out-do each other....
See Rich Holmes's pages for more information about beasts.