Mouse King (The Nutcracker)

The Mouse King (also known as Rat King in some versions) is the main antagonist in the novel and ballet adaption, The Nutcracker. He is an oppresive ruler who wishes to rule over a magical kingdom where he comes from. He becomes successful as he transformed the prince into a nutcracker and overthrew him. The prince, however, still rebels against the Mouse King, as the story introduces the Mouse King and the Nutcracker Prince waging in a battle against each other, which soon brought the attention of the story's protagonist.

The Novel
On Christmas Eve, a girl named Marie is visited by her godfather Drosselmeier who persent Marie a nutcracker as her present. Marie enjoys the gift, but then her brother Fritz accidentally broke it when he wanted to play with it. Marie becomse upset and takes the nutcracker away from Fritz, as she promises to take care of it.

Later at midnight, when everyone was sleeping, the Mouse King and his army invades Marie's house. The Nutcracker soon comes alive and leads an army of toys into battle against the Mouse King.