In Phantasy Star Online 2, Mag is not a traditional character but rather a loyal robotic companion that assists players throughout their adventures. Mags provide a variety of support functions, such as boosting player stats, performing special attacks, and even healing. Each Mag can be customized and evolved, adapting to the player's style and needs. Though not sentient or possessing a personal storyline, Mags play a crucial support role, significantly impacting gameplay and strategy.