Somehow having survived in her friend's house in the nearby neighborhood for almost a month, Rebecca hid from the creatures outside. Only after one of them chewed through the power cables did she try to escape. She took Jane's car and fled down the roads with no goal in sight, other than swerving around the mist creatures like a maniac on wheels. She totaled two cars and escaped into the woods to shake her horrible pursuers, only to stumble up to the only source of light she could see: The Mall.

Desperate to find a way inside, she banged on all entrances until Kid Prinssi noticed her and opened a door for Rebecca, allowing the terrified woman inside. She was a nervous wreck, wracked by horrible trauma, and stammering about having been forced to murder friends to survive. Tallulah treated her and found Rebecca to be physically fine, aside from a self-inflicted injury that happened when Rebecca punched a mirror in the bar bathroom.

Heir to the Jameson family—Jameson of Irish whiskey fame—Rebecca is a petite and slender woman in her forties. When she is not suffering from PTSD flashbacks, she can be energetic and observant, if not occasionally tactless. Clearly, she lived a life of luxury before the mist. Judging by her physique, she has been staying in excellent shape all her life.

According to Linda's census, Rebecca is an organizer. According to a conversation with Jack "V2" Jones, Rebecca is a housewife and thriller/mystery writer. She volunteered to investigate the strange events in and around the mall, hoping to shed some light on its bizarre riddles, and find answers to the many questions plaguing the survivors.