Who serves as a character foil to Gina in the novel, Abigail?

Susanna is a foil to Gina, in the sense that she symbolizes the ways in which adulthood is characterized by humility, careful observation and thoughtful action, whereas Gina represents a child who believes that she is more mature than she actually is and acts on incomplete or false information. Throughout most of the novel, Gina associates Susanna with simplicity and childish obedience to the rules, because of her devout and saintly nature, as well as her seeming obliviousness to the deviousness of the students. She refers to Susanna as a child particularly when she identifies with the world outside of the Matula; for example, right before she tries to escape with Feri, she thinks of Susanna as a “pupil, bound by her monochrome rules and regulations,” a “simple-minded” child who “would remain a prisoner in the fortress forever” (269). However, when Gina realizes that she has been tricked by Feri and Susanna saves her life at Mitsi Horn’s house, the narrator shows how Gina’s fate ultimately lies in the hands of the adults around her, who see the bigger picture. Finally, when Gina realizes that Susanna has seen through Kőnig’s act all along — and therefore knows more than she reveals — she develops humility.