Nothing is known about Mandy's life before or during the outbreak, except that she had a father, David, and a younger sister, Alyssa.
Mandy is with her family in a hardware store as they witness a walker attack a young man and devour him alive. David secures the machete and proceeds to return home with his daughters. Time passes by as Mandy continuously practices with the machete. After running out of food, the family goes on a scavenging mission when Alyssa is grabbed by the hair by a zombie and killed, much to the horror of Mandy. Afterwards, Mandy gets her hair cut off by her father using the red machete.
Mandy comforts her father as he mourns over Alyssa's grave after he finishes carving her name. Afterwards, Mandy and David carry fish and sit at a picnic table as he shows her how to properly cut into a fish, and feast on the fish for dinner. They then continue to practice using her machete as she hits a tree, David is impressed and Mandy heads back inside. Mandy sits in the house and David brings her the machete with her name carved in it, she smiles.
Later, Mandy is hanging cans on a wire around her home and suddenly hears her father scream. She runs to him and see's him covering his arm, when it is revealed he's bitten she stabs him in the head with her machete off-screen. She buries him next to Alyssa, with the words "papa" carved into the rock used as a tombstone.
A few days pass and Mandy is inside of her home until she hears the bell go off, signanling her that someone is near. She hears the door open, and quickly heads inside of a closet. Derek walks into the room and Mandy watches him look around, as he walks towards the closet she becomes frightened, but he ends up taking her red machete sitting on the table outside of the closet door.
This list shows the victims Mandy has killed:
|Hannah & Andrew's Family||Billy • Jamie • Max • Hannah • Andrew • Judy|
|Palmer Family||Mike • Maggie • Palmer Children|
|Cold Storage||Chase • Kelly • B.J. • Harris • Lenny|
|The Oath||Paul • Gale • Karina|
|Flight 462||Alex • Jake • Michael • Alan • Tom • Ian • Connie • Deidre • Anthony • Suzanne • Marcus|
|Passage||Sierra • Gabi|
|Red Machete||Mandy • Derek • David • Alyssa • Young Man|