Mereldar

Mereldar was the sister of General Lordain and originally a renowned warrior in the united human army during the Troll Wars. She was among the soldiers saved when her brother selflessly sacrificed himself to hold off an overwhelming force of Amani trolls.

When the war ended, Mereldar dedicated her life to caring for humanity's wounded veterans. It was she who first spoke to other humans about visions of the Light. In her dreams, Mereldar saw five strange, inhuman forms thrumming with holy power that filled her mind with the wisdom of holiness, protection, justice, retribution, and compassion. When she put their wordless teachings into practice, power seemed to flow through her, miraculously curing wounds and illnesses.

Mereldar met with others who had also reported seeing the visions, and together they codified and wrote down the wisdom of this higher power, based on the tenet of selflessness and a belief that the Light dwelled in all things. The movement sparked widespread faith in the Light and became the predominant human religion, and centuries later the different Light-based traditions and belief systems were codified by Lordaeron's leaders into the Church of the Holy Light.

Speculation

 * The codices written by Mereldar and the other human prophets might have become the five librams given to the first Knights of the Silver Hand.
 * Kelsing, Lordain's nephew, was either Mereldar's son or nephew, as it is unknown if there was a third sibling or not.