A Meister (職人Shokunin; lit. artisan) is someone who has the knowledge to become an Exorcist. Acquiring the title of Meister is essentially the most basic qualification for becoming an Exorcist. There are five categories of Meister: Knight, Dragoon, Doctor, Tamer, and Aria. The difference between the categories is their style of fighting.
A Knight (騎士Naito) is a Meister who uses swords to fight Demons. Some Knights use enchanted Demon blades, which have unique abilities and are quite rare. Other Knights are also able to use powerful, long-range magic techniques from their blades.
A Dragoon (竜騎士Doragūn) is a Meister who fights using ranged weapons, such as handguns and machine guns. Some may use specific weapons or ammunition to exploit the weaknesses of certain elemental demons.
A Doctor (医工騎士Dokutā) is a Meister who treats and heals wounds inflicted by Demons, known as mashō. These people typically possess the knowledge of basic first-aid, emergency first-aid, and the ability to treat ordinary injuries.