Devoted to the teachings of Ququruka, Lalai is a talented mage who delves into the history and teachings of Mhach. She is a stout believer that black magic can be used for good, and can be quite defensive when others insult this class of magic.
Though normally an attendant at the Milvaneth Sacrarium, it has since been closed due to damage during the Calamity and has yet to be reopened. Lalai is a major contact for the Black Mage guild, relaying instructions from Ququruka, before eventually sending the Warrior of Light to consult Kazagg Chah.
In the quest "Always Bet on Black," Lalai learns that Ququruka isn't quite who he claimed he is, but the man is ultimately exonerated when he explains his story with Barbatos.
Lalai discovers a note among Ququruka's personal affects regarding the whereabouts of two priceless tomes: the Books of Nald and Thal. As repositories of black magic, she wishes to secure the relics so their knowledge can be studied. They recover the Book of Nald at Nald's Reflection, but when they search for the Book of Thal at Thal's Respite, Lalai is shocked to discover it had been recently pilfered by an unknown thief.
Lalai appears as an NPC ally during the job quest "The Defiant Ones," where she fights alongside the player.