Agnes has come to Gallow Green to look for her sister Grace. She also appears to shares something in common with the second Mrs. De Winter from Rebecca. The character's name comes from one of the accused to Paisley witches trial.
Notable Feature Edit
She’ll be wearing a knee length skirt and a beige blouse, carrying a suitcase around.
One on OneEdit
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I believe she represents the equivalent of one of the siblings from King Duncan's sons. She makes reference to moonlight and Fleance (Banquo's son) also references the moon in regards to time. Additionally, she said meet me back at the manderly multiple times before the end of the encounter - it points to a rendezvous such as the one between Fleance and Banquo. (" Fleance: the moon is down; I have not heard the clock.")