It is an Axe
The manufacturer doesn't want to use it, the buyer doesn't need to use it and the user doesn't know he's using it. What is it?
A straight standing soldier, From his crest to his toe, Combating all darkness, His primary foe. Though 'tis unfair, It's the profession he chose, The longer he fights, The shorter he grows.
They Fight against the vampires. They know their spell. They fight against demons. They are the most famous ghost hunters They always do together as they are brothers.
Who are they?