The Royal Wizard is a position in Ingarian heirarchy and military, called the Royal Sorcerer in the movie. The Royal Wizard is in charge of supplying magic for the army and for the King of Ingary himself.
It seems other countries, or at least High Norland also have their own Royal Wizards, who keep in contact with one another; however the king of one country cannot call upon the aid of a Royal Wizard of another country. This is seen in House of Many Ways where Howl disguises himself as a small child named "Twinkle" in order to help Sophie who was called by the King of High Norland to find the missing treasury because the King could not call on Howl's help directly.
Notable Royal Wizards
Below are listed some notable Royal Wizards and their apprentices/assistants
- Madame Suliman (Movie only)
- Countless cloned pages