The Order of The Arrow is a guild dedicated to eradicating demons and those that befriend them. Formed by the princesses of Equestria,[citation needed] this group has very high authority and is given complete respect by all. Shopkeepers will typically give discounts or even free goods to members, and inns will not charge for rooms used. On top of respect, the Order is also somewhat feared, as just being accused of being a diabolist can get you in trouble with them.

The main branch is located in Equestria, with many others elsewhere, including one in the Brightlands. This is the one where Venator and Alacris come from, two investigators. Another notable member is Uictoria who has two others under her command, the siblings Bellator and Praelia.

Among investigators, the group also has positions such as soldiers, guards, and infiltrators. And higher ranks with accusors and assassins. The rules of the order are not limiting on the life of it's members, there is nothing stopping them from living fairly regular lives and having families, other than the amount of time and dedication required in vanquishing evil.