Like all draugen, Abigail looks like a humanoid, ghostly creature, with her bones visible inside her body. She has glowing eyes, and seaweed on her head. her left hand resembles the claw from a crab, and she has a metal hook embedded in her right shin. She is the only draug on her ship to wear clothes.
Abigail can be quite friendly towards visitors on her ship, but is relentless once she has her mind set on making any sailor part of her crew. She loves rebels and rule-breakers, and thus quickly takes a liking to the Wood Man when he tries to steal a sextant from her ship.
Abigail has been dead for at least 300 years by the time she first appears in the show. She and her crew of Draugen sail the waters near Trolberg. They never return to land because they prefer to be draugen rather than ordinary Ghosts.
Abigail encounters Hilda, Wood Man and Twig when they seek out her ship. She is not interested in Hilda's offer to return to land and be reunited with her loved ones there. She attempts to kill the three by feeding them to a Salt-Lion so they can join her crew, but Nicholas reminds everybody of the rule that a captive of the Draugen can win their freedom by beating the Draugen in a race. Abigail accepts the challenge. Hilda and Wood Man win thanks to a weather spirit, but because Wood Man still has the sextant he stole from the ship, she keeps chasing them. Eventually, Hilda lures the Draugen to the local graveyard, and summons the ghosts there. Abigail is thus reunited with the ghost of her father who, after scolding her for staying away for so long, happily welcomes his daughter back home. The two depart into his grave.
The events of "Chapter 2: The Draugen" are also adapted into the novel "Hilda and the Ghost Ship". Abigail is not mentioned by name in this story, but just referred to as The Captain. Like in the series, she wants to make Hilda and Wood Man part of her crew. After they defeat her in the race however, she and her crew return to sea and don't pursuit them any further. She thus does not reunite with her father.