This retelling challenges the traditional fairytale dichotomy of good versus evil. Cinderella, typically the epitome of innocence, is revealed to possess terrifying and eldritch powers, transforming her into the monster the family hides. Conversely, Eunice, the supposed 'ugly' stepsister, becomes a more relatable and sympathetic figure, burdened with the responsibility of her stepsister's dark secret. The novel blurs the lines between hero and villain, forcing readers to question their preconceived notions.

The weight of unspoken truths and hidden identities forms a core theme. Eunice has spent her life controlled by the secret of Cinderella's powers, sacrificing her own happiness and freedom. The story delves into the psychological impact of such secrets, exploring the fear, resentment, and desperation that festers within the family as they attempt to maintain their unsettling facade.

Eunice's desire to escape her predetermined role in society mirrors the struggles of many. Trapped by her family's secret and societal pressures, Eunice finds solace in the possibility of love and acceptance from Prince Credence. Her journey to the ball symbolizes a rebellion against her prescribed life, highlighting the universal longing for self-discovery and autonomy.