Zoe Monroe, also known as Monroe, was a recurring character in the first, second, and third seasons. She was portrayed by Katie Stuart and debuted in His Sister's Keeper. She was killed in the sixth episode of Season Three, Bitter Harvest. Monroe was part of the original 100. Because of her crime, Monroe was considered "expendable" and is chosen as one of the 100 Delinquents sent down to Earth to see if it is survivable. Monroe was one of the twenty Gunners in The Camp.