Light's Chosen

The Light's Chosen (or simply the Chosen) are an elite order of draenei paladins commanded by Prophet Velen, the leader of the draenei race.

First seen some time after the arrival of the draenei on Azeroth, the Light's Chosen have since played a role in resisting the third invasion of the Burning Legion. During the war, the demons attacked the draenei capital of the Exodar. During the ensuing battle, the Light's Chosen fought by Velen's side, ultimately prevailing.

The exact nature of the order and the extent of its membership is unclear, however they likely serve as personal agents to the Prophet in his quest to preserve the Light.

Battle for the Exodar
Some time following the beginning of the Burning Legion's third invasion of Azeroth, the demons launched a massive assault on the Exodar, the capital of the draenei on Azeroth. The severity of the attack initially overwhelmed the Exodar's inhabitants, and the demons overran the city. Many of the civilians subsequently fled to the Vault of Lights, where they remained under the protection of the Light's Chosen and Prophet Velen himself, who created a barrier of light to shield them.

When the champion sent by Archmage Khadgar arrived with the Light's Heart, the tide began to gradually turn against the demons. With many of the Legion's portals and lieutenants neutralized, Velen gave the order for the Light's Chosen to advance a purge any remaining demons from the city. Cutting their way through any demons in their path, the Chosen destroyed the remaining Legion portals in the Exodar, effectively ending the invasion.

Upon inspecting the Light's Heart, however, the Prophet soon realized the Legion's true goal for the attack had been to slay the naaru O'ros. Rushing to the Seat of the Naaru, Velen and Khadgar's champion succeeded in defeating the eredar commanding the Legion's attack, High General Rakeesh, who transpired to be Velen's lost son. The Light's Chosen arrived shortly after battle, receiving stern instructions from their Prophet to make the necessary preparations to return home.

They later traveled on the Vindicaar to Argus and participated in the Argus Campaign. After the Burning Crusade was finally brought to a decisive end, the draenei reunited with their Lightforged kin, who subsequently joined the Alliance, and some of the surviving Light's Chosen, such as Jost and Divinius, accompanied Velen to Stormwind during the Fourth War, apparently acting as his personal bodyguards.

Speculation
The Light's Chosen may be a subgroup of the Hand of Argus. They may be related to the Shield of Velen.