Maddison is the daughter of a local gang's boss. Since they are the lesser of the gangs, Mason is usually the one to clean them up, which puts his reputation with them very low, especially for Maddison.
Post-story, the gang changes focus and instead does their part to clean up the town of the troublesome gangs instead. Which means Maddison has to find a different life. Mason and Miranda let her stay with them, which ends up becoming a very frustrating situation, but in the end they help Maddison to get on her feet and take care of herself (without running back home to daddy.) Afterwards she and Mason form a relationship and begin dating, which goes... surprisingly better than either of them thought.
Maddison is very outspoken and has an eye for fashion. Besides her regular get-up, she tends to swap between many other dresses and outfits. She often times gets into trouble and will use her charm to get herself out. However that only lasts for so long and she ends up hopping to the next person to bail her out and often burns a lot of bridges. She likes wine and may over-indulge at times, but only for pleasure (she's not one to drown her sorrows, she'd rather go on a spending spree for that.) She also helps Mason to learn to loosen up a bit, and brings out his more romantic side he killed off a long time ago.