* Siren: A beautiful creature with a melodious voice that lured sailors to their deaths on treacherous rocks. They represent seduction, deception, and temptation.
* Harpy: A monstrous creature with a bird-like body, sharp claws, and a taste for human flesh. They represent evil, destruction, and chaos.
By calling Abigail something "between a siren and harpy," the speaker is suggesting that she is a combination of both alluring and destructive forces. She is both attractive and dangerous, capable of captivating and harming at the same time.
The phrase also implies that Abigail's nature is complex and contradictory, making her a difficult and potentially devastating force.
This allusion is often used to highlight the dangerous and manipulative nature of a female character, especially if she is using her charm and beauty to achieve her own goals.