Listeners

Listeners are the voices' armed forces and carry out their orders. Many were voices themselves and trust them implicitly, but anyone can become a listener when approved by the voices; some join the ranks as pilgrimage or for repenting crimes and sins.
Some rulers grant listeners ambassadorial status and help in their tasks, others point out that listeners, other than voices who are utterly truthful, are just regular people and might have their own agenda. The treatment of listeners has been in debate for ages.

"The council doesn't care if the voices send an army of listeners! We will not agree to any search of the catacombs unless we hear it from a voice that they need to!"
— Short Jugiel, councilman

All listeners are skillful warriors, focusing on traditional weaponry associated with the Four, as well as experts in manners and travel. Accompanying the infirm voices is a common task, but they do much more; they seek out collectors, negotiate with elementarians, acquire artifacts... They often hire more hands for extensive tasks.

"No, I have no idea why I am taking a sealed spear across half of Lozir and into the Singing Ryaq. That's what trust is for, and I trust the voices with my spirit."
— Shagruun, listener

Artists' notes
Stuff for legends is what listeners are. Some of the greatest heroes currently alive are in service to the voices, like Vranu Whiteblade. Many of the fantasy settings I enjoy, particularly computer rpgs like the Elder Scrolls, have several orders to join, and the listeners are one of those - handing out tasks of increasing difficulty to the heroes, with appropriately increasing prestige for surviving each one.