Margareth is first seen when she speaks to Britta in the family shop. She appears kind, gentle, and concerned when Britta announces that she is going to see Captain Gripp, for their mother had forbidden them to go to the harbour.
When Britta reveals that she setting sail on the Star of Deltora as a finalist for the Rosalyn apprenticeship, Maarie spurns her, but Margareth does not. She goes after Britta and tries to defend Maarie's actions without success. She gives Britta a pouch of money which was supposed to have been a birthday present and then hugs Britta and begs her to come home safely.
Margareth has a very gentle and timid personality. She is very generous and kind, seen when she does not reject Britta as their mother has done, and instead chooses to support and help her. She is also very empathetic—she seems to understand Maarie's mental state and her cruel words to Britta, and does not judge her for it as Britta does.
She is often said to be like her mother, Maarie, in temperament.