Barely anything is known about her life before the outbreak, except her father is a man named Rory. She might have been born in to the apocalypse, judging by her age.
Melissa, and her father, are seen part of Most Holy Redeemer Parish.
Melissa, along with her father, leaves the camp after the arrival of Reverend Garlitz, main reason being him torturing The Scorpion members. Her status remains unknown.