Luc is the holder of the True Wind Rune, and is an apprentice under Leknaat. He is originally from Harmonia, but he was involved in some kind of incident about ten years before the Dunan Unification War at the One Temple. He participated in both the Gate Rune Wars and Dunan Unifciation War upon Leknaat's command, and grudgingly fights in these wars. However, when he confronted Sasarai, a Harmonian High Priest, he showed rare enthusiam to fight and caused the Harmonian forces to flee.
Sometime after the Dunan Unification War, he became worried about the future he saw coming from the True Rune, and angered at his destiny as a vessel for True Runes. He believed that there would be complete balance (Dharma) in the world, and it would be lifeless. He decided to take things into his own hands, and attempted to destroy a true rune: his. He enlisted prominent strategist Albert Silverberg (who helped him recruit Yuber the Black Knight) and Sarah, the great magician whom he rescued from the Circle Palace in Crystal Valley previously. Albert knows that to destroy the True Rune, he needs control of multiple other true runes, namely the other elemental runes.
To execute his plan, he became a bishop in Harmonia thanks to Hikusaak, his identity hidden by a mask. Knowing he needs to bring the other true elemental rune bearers out into the open, he first starts rumors about the Fire Bringer being active in the Grasslands. Then he helped incite a war in the Grasslands by having Sarah attack the Lizard Clan disguised as Chris Lightfellow of the Zexen Knights. The Lizard Clan Chief Zepon is killed in the attack, causing the infuriated Lizard Clan; to ambush the Zexen Knights, resulting in all-out war in the Grasslands. The ensuing conflict allowed him access to the bearers of the True Fire, Water, Earth, and Lightning Runes, and he was able to steal the runes using a technique he learned in Harmonia. However, the Fire Bringer led by the Flame Champion; were able to defeat him at the Ceremonial Site, and stop his plans.
He realized the futility of his plans, and makes peace with his mentor Leknaat, whom he betrayed, but it is too late for him. He dies together with Sarah; and his soul is gone forever, at rest.