Lady Jaina Proudmoore is the leader of the Kirin Tor and ruler of Dalaran. She is the daughter of Grand Admiral Daelin Proudmoore and sister of Derek Proudmoore. As such she is Princess of the Kingdom of Kul Tiras, although she never uses the title.
Jaina was one of the most trusted sorceresses of Dalaran, trained as the personal agent of the Archmage Antonidas, leader of the Kirin Tor. Early in the Third War, Antonidas dispatched Jaina to discover what was happening in the northlands of Lordaeron. She was escorted by her childhood friend and one-time romantic interest, Prince Arthas Menethil, to uncover if the plague had magical origins. Jaina saw the fall of Lordaeron firsthand and — guided by a mysterious prophet — rallied what survivors she could and fled across the sea to Kalimdor.
Jaina swore to defeat the Burning Legion and its sinister agents any way she could. Joining forces with the night elves and even the orcish Horde, Jaina helped defeat the demon Archimonde and banish the Legion. She then gathered the human survivors in Kalimdor and founded the port city of Theramore Isle, where she ruled over the tattered remnants of the Alliance and hoped to reunite the distant human kingdoms once more.
Shortly after the fall of Deathwing, the Horde, under orders from Warchief Garrosh Hellscream, unleashed a devastating attack against Theramore, destroying the city. Jaina managed to escape with her life, but the experience transformed her, making her more bellicose and even altering her appearance. Following the death of Rhonin during the attack, and fulfilling a prophecy made by the dragon-mage Korialstrasz, Jaina took the fallen mage's place as leader of the Kirin Tor.