The Emperor, also known as the Adversary, is the official ruler of the Empire. Not to be confused with the real Adversary, Geppetto. The Emperor, being created by Geppetto, is merely a puppet, and thus loyal to him.
Although he is a puppet emperor for his father, just like his other wooden siblings, he is capable of independent thoughts. When Geppetto fell into depression after the Battle of Haven and unable to give orders, he managed to keep the Empire under control with the help of Snow Queen.
He is a fearsome fighter and almost completely invulnerable thanks to the numerous spells that have been put on him by the mages. He managed to defeat Bigby in his true form and was only defeated by Boy Blue through the use of his Vorpal Sword.