Maggie is the third of four kids to Homer and Marge, and twin sister to Lucy, when she was a baby, she was being babysat by Professor Frink, and Maggie playfully used his Rift Portal to send herself to Gaia where she was found by Locke Cole and Terra Branford, from then on, she was raised by the two warriors and given a sword so that she can fight and defend herself.

Seven years later, the family came to find her, and she returned home with them, in Springfield, she would continue to train with her sword to hone her skills, but as she grew older, she gave up the weapon and took an interest in computers, and web design. She was working volunteerly online during her years in high school.

Regularly, Maggie would go back to Gaia to visit Locke and Terra, and would sometimes help them with any problems they had.

By the time she was 24, Maggie would have gotten married to her boyfriend from high school, Mark, and had a daughter of her own, and when she was moving house, she would visit Locke and Terra, and then return home to ruination, Maggie took up her sword once more to restore the town of Springfield back to it's former glory.

In game, Maggie has the most different classifications of any character. As a child, she is able to learn basic white magic upto level two spells (-ra level), but her proficiency with those spells are limited, lowering her usefulness as a white mage, she does later learn better spells as an adult, but her proficiency with them doesn't improve. Her true excel lies in the abilities with her sword, she has a variety of techniques learned from Cyan Garamonde to aid in dispatching enemies with elemental affinities easily, without the need for Black Magic. She can, despite being the slowest character, she can steal items from the enemy too, and is the only character besides Locke who is capable of doing so.