Boy and Girl have existed for a very long time, even at the beginning of time itself, manifesting as representations of the two most basic genders. The King of Time and The Queen of Space were unsure of what job to assign them, but many years later, they assigned the duo to be entertainers, as their shape-shifting abilities and dramatic flairs make for a good show. However, after mankind emerged on earth, they were given new roles : babysitters, which they've been doing until the present day.