Abby is a tall, muscular woman in her early twenties with dark blonde hair, pale, freckled skin, and blue eyes. Her build is particularly muscular due to years of training as a WLF soldier, a stark contrast to her earlier, more average physique as a Firefly. She is often described as having a "commanding presence" due to her physical strength and combat skills, She is stoic, blunt, and strong, both physically and mentally, but also capable of compassion and loyalty.