Jaina was one of the most talented and trusted sorceresses of the Kirin Tor. She was dispatched by Archmage Antonidas 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.
This version of Jaina Proudmoore serves as the player's hero during the introductory tutorial.