Andi Prendergast is the co-worker and the ex-girlfriend of Sam Oliver. She lives at home with her mother, attends college part-time, and is an accomplished prankster - with Ted as her frequent target. Andi is also the only other main character who has seen the Devil at least twice, although she did not know it. Once when he went with a shopping cart to the Work Bench ("Pilot") and once when he placed her in danger in order to motivate Sam to capture an escaped soul posing as a magician ("Magic").