Louisoix Leveilleur is a prominent non-playable character in Final Fantasy XIV. He is the leader of the Circle of Knowing, a group involved in the Seventh Umbral Era storyline. He is most notable as the NPC involved in all quests related to Primals in version 1.xx. He is voiced by David Lodge.
Louisoix is an elderly Elezen wearing an acton, armored leggings, and a horned staff - the Tupsimati - bearing the mark of Thaliak. He bears the Circle of Knowing tattoo on his forehead as well as his neck. He has white hair with a beard and a receding hairline, and closely resembles the Revs of Final Fantasy Tactics A2: Grimoire of the Rift in skin tone.
Louisoix, like the rest of the Circle, is well-spoken and informed. He is the typical wise old wizard, offering guidance and encouraging adventurers to overcome the daunting threat of the Primals.
Louisoix traveled from the Circle's homeland of Sharlayan to Gridania in response to the first appearance of a Primal, Ifrit. Since then he has used his skills and connections to help adventurers gather the items needed to enter the lairs of the Primals. He has also joined the Eorzean Alliance under Gridania's banner as their chief tactician. Gridania's newspaper, The Raven, has also credited him with initiating the Alliance's shift to the offensive, as well as ushering adventurers to join the battle.
During the quest Living on a Prayer, Louisoix and the Circle of Knowing marked stones throughout Eorzea with the symbols of The Twelve, and urged adventurers to offer prayers to each of them with the hopes of summoning the yet unseen gods.
Once the final battle before Dalamud's fall began, Louisoix supported the Eorzean Alliance in battle, protecting its combatants from Bahamut's rain of destruction with several spells. However, as Dalamud shattered and Bahamut escaped its imprisonment, all he could do was teleport the adventurers with an unknown spell, before the dragon's Megaflare ravaged the entire battlefield and presumably killed the majority of the people present in the area, including Louisoix.
As part of a New Years greeting from the development team, Yoshida included a prophetic verse from Louisoix. Upon careful comparison between language versions, the consistent message implies one of two entities will decide the fate of the world through actions taken on the Primals: one entity of light and one of darkness/might.
During the Adventurer and Alisaie's journey into the Binding Coil of Bahamut, Louisoix has been watching the party since they destroyed the ADS in Turn 1 and disappeared before being noticed. Following the defeat of Twintania, Alisaie sees her grandfather with Nael Deus Darnus as they depart further into the Binding Coil. Despite her hopes, having silenced Deus Darnus when they were at the 4th turn of the Second Coil of Bahamut, Louisoix is revealed to be under Bahamut's control as he nearly kills Alisaie for meddling in the Primal's resurrection while threatening her and the Adventurer that he will not hold back if they enter the third coil.
Once the party reaches the Main Bridge of Internment Hulk IC-06, Louisoix interrupts Alisaie's attempt to turn off the third coil. He tells the party the story behind Meracydia and Bahamut and why humans and dragons cannot coexist. Alphinaud realizes Louisoix is not under Bahamut's control but has himself become a Primal, Phoenix.
- Main article: Phoenix (Final Fantasy XIV)
Louisoix is fought as the boss of The Final Coil of Bahamut - Turn 3 in his Primal form.
Louisoix appears with an Ice-elemental card in Final Fantasy Trading Card Game.
Leveilleur roughly translates to "the watchman" in French.
The French version of his journal entry lists him as "Louisoix le Preux", or "Louisoix the Valiant". This does not conflict with his English surname as it is a title.
The German version ends with "Aus Louisoix Hinterlassenschaft", which roughly translates to "From Louisoix's Legacy". The Legacy Campaign is a promotion to give discounts and bonuses to players who stayed with the game after billing resumed January of 2012.
- It is implied that the horn on the Tupsimati is similar to the horns featured in 1.0 main storyline quests.