Lightforged draenei

The Lightforged draenei are a group of draenei part of the Army of the Light and the Alliance. For untold millennia, the Army of the Light waged war against the Burning Legion throughout the Twisting Nether. The draenei most committed to their long crusade would undergo a ritual to become Lightforged, infusing their bodies with the very essence of the Holy Light. After finally achieving victory on Argus, the Lightforged draenei have undertaken a new mission: protecting Azeroth from rising threats, and helping their kin from the Alliance push back against Horde aggression. They became an allied race and pledged their loyalty to King Anduin Wrynn.

They were introduced in Legion.

History
Originally part of the draenei who boarded the Genedar and left Argus, the Genedar then split into two different ships, the Genedar and the Xenedar, and went their separate ways. The draenei's most elite warriors followed the naaru Xe'ra aboard the Xenedar to wage war on the Burning Legion. They were infused with the essence of the Holy Light and became Lightforged.

Legion
The Lightforged draenei are led by the prime naaru Xe'ra and High Exarch Turalyon. They also have five champions: Grand Vindicator Sorvos (paladin), Baraat the Longshot (hunter), Archmage Y'mera (mage), Blademaster Telaamon (blademaster), and Captain Fareeya (warrior).

Having battled the Burning Legion for thousands of years, the Army of the Light unites with the heroes of Azeroth during their invasion of Argus. Despite the Xenedar being shot down, the Lightforged rally under their champions and battle demons across Krokuun and the Antoran Wastes. Archmage Y'mera also aids adventurers in Mac'Aree when seeking Archimonde's third of the Crown of the Triumvirate.

The Lightforged forces later laid siege to Antorus, the Burning Throne, hoping to end the Burning Crusade once and for all. Their forces battled the Legion's endless armies while the class order leaders destroyed the Legion's commanders, war machines, and access to reinforcements. The Lightforged were witness to Sargeras' defeat and imprisonment, their grand mission finally accomplished.

Battle for Azeroth
Once the Burning Crusade was over, the Lightforged turned their attention to Azeroth, where the draenei were living. Foreseeing the upcoming war between the Alliance and the Horde, the Lightforged decided to stand alongside their new allies after millennia separated.

High Exarch Turalyon believes upholding the Alliance's ideals would be a worthy cause for the Lightforged and offers the Army of the Light's services to High King Anduin Wrynn. With King Wrynn's endorsement, Turalyon and one of the class order leaders travel to the Vindicaar, still apparently home to the Lightforged, to announce the Army of the Light's acceptance into the Alliance. Captain Fareeya is enthusiastic about the idea but claims that they are in the middle of recruiting more Lightforged. Turalyon invites the class order leader to witness how draenei are turned into Lightforged: The Forge of Aeons, which reinforces a draenei's mind, body, and soul with the power of the light after facing their inner demons. T'paartos is one of the Lightforged initiates and cannot undergo the trials without a second. The adventurer volunteers to take part in T'paartos' initiation ritual as his second and undergoes the trials with him. Having successfully completed the trials, T'paartos is officially inducted into the order of the Lightforged. Turalyon claims the Lightforged are impressed by their strength and are more than willing to ally themselves with the Alliance, the heroes who helped them stop the Burning Crusade, and continue bringing peace and justice to Azeroth. Turalyon leaves Captain Fareeya to organize their troops while he returns to King Wrynn to give the Army of the Light's official pledge of loyalty.

Captain Fareeya will task new Lightforged draenei to go forth into Azeroth and fulfill their new mandate: spread the Light's justice and uphold the ideals of the Alliance.

During the Faction Assault on Drustvar, the Lightforged aided the Alliance in defending the region from the Horde as members of the Purified, an Alliance contingent of human, draenei, dwarf, and Lightforged draenei soldiers empowered by the Light. Due to threat of Vindicator Caeduum and his Lightforged, Rokhan, Master Gadrin, and Madam Konawla used a ritual to imbue Horde adventurers with the ancient powers of trolls to fight against them, and with this power Vindicator Caeduum and a number of his forces were slain.

Alternate Draenor
After Archimonde's fall on, the orcs and draenei worked together to drive the Burning Legion from. During this time, more naaru arrived on Draenor and, without demons to fight, the draenei became fixated upon the Light. At some point, Draenor began to deteriorate for unknown reasons. The Lightbound and the blamed each other. Having received visions from the Light Mother, the High Exarch Yrel knew that the Army of the Light would bring order to countless worlds in the Great Dark Beyond.

The naaru reforged the draenei in the Light, becoming the Lightbound, then compelled them to spread their influence among the orcs in a more antagonistic organization, seeking to spread the Light's influence across the planet; by force if necessary. A few orcs converted to the Light willingly, but others had the Light forced upon them. Some orcs even sided with the draenei against their own kin. War followed, until the two sides found themselves in a stalemate in Gorgrond, where the Lightbound refused to attack Hellsreach Citadel.

While the Mag'har were dealing with Kor'gall, Greatson of Kor'gall and his followers, Lightbound forces led by captured Evermorn Hold and used it as a staging ground for an attack against Beastwatch. As the Mag'har celebrated their victory after repelled the assault and retaliated, High Exarch Yrel and her entire armies arrived on the field. With her vastly superior numbers, the High Exarch offered Hellscream and the Mag'har one last chance to embrace the Light by joining the Lightbound. However, Grommash refused her offer, and stayed behind with to push back the Lightbound while the Mag'har fled to Azeroth.

Appearance
Lightforged draenei possess an alabaster-marble colored skin and white hair. In contrast with other draenei, the Lightforged have bright, golden eyes, and their bodies are marked with glowing and golden tattoos. Their hooves are also ornamented with gold, and their Mark of the Naaru is a different, golden sigil.

Notes and trivia

 * The idea of people being depicted with their eyes glowing golden with the Light is an old one, starting with the paladins of the Second War as well as some depictions of Turalyon and Lady Liadrin. The paladin on the Divine Favor (paladin ability) TCG card had glowing eyes too.
 * Captain Fareeya is the first Lightforged draenei seen by most players.
 * Lightforged draenei have normal draenei children, as shown in the allied race Vindicaar.
 * Lightforged draenei retain many draenei themes. See Draenei for Draenei cultural inspirations.
 * There seems to be more Greek-derived names among the Lightforged Draenei, such as Telaamon and Xe'ra (xeros, ξηρός) than the more Semitic and Semitic-derived names of the Draenei.
 * The line "give me a hundred Lightforged. Barring that, a thousand regular troops" is taken verbatim from Warhammer 40,000, only with Lightforged replacing "Space Marines."