Missionaries are not particularly an organized group specifically, but the term refers to anyone who takes up arms against the Black Crusaders in Farther Earth. This term also refers to people who guard and defend the walls in Siverial, despite whatever their opinions on the crusaders may be.

Missionaries have to:

• know and believe that the Black Crusaders true intents are malicious and selfish, despite their "good deeds." Most people think it is absurd that there are people that think ill of the crusaders/ knights, so they often ostracize these people.
• Have done something to slow down, interrupt, or block the crusaders in some way.

Missionaries are often Deserters.

No one calls themselves a missionary, its more like something that people would call you after you've done something against the crusaders, almost like it were a crime or slur. "He ran the crusaders out of town the other day, fucking missionary. Who's gonna protect us now?" However, most people falling under this term really don't care about the term and despite people trying to dishearten them by it, they are not affected.