The novella’s title establishes the mask as its central symbol, representing Jean’s constructed identity and the exhausting performance of femininity required for survival. Jean’s public persona is that of a meek and unassuming governess: a “small, thin, and colorless” young woman of 19 (5). This facade conceals her true self: When alone, Jean literally unmasks into a “haggard, worn, and moody woman of thirty at least” (13). This symbol directly illuminates The Performance of Feminine Identity, arguing that the social roles available to women are restrictive constructs that must be either accepted or manipulated. Jean’s mask is a strategic tool she wields to navigate a patriarchal world that values youth and submission over experience and ambition in women. Her power derives from her ability to maintain a separation between her performed self and her true identity. 

By fooling the Coventrys, Jean also exposes their own mask-like veneers, which often stem from rigid social position. Caught up in his growing infatuation with Jean, Gerald decides to shake off his aristocratic languor: “[M]y indolent indifference is but the mask under which I conceal my real self. I could be as passionate, as energetic and aspiring as Ned, if I had any aim in life” (71). However, Gerald is wrong about himself: The laziness is his real nature, and the burst of energy that propels him into a day of managing the estate and securing Edward’s commission is a short-lived masquerade of action. Once Jean wins by marrying Sir John, it’s clear that Gerald will retreat into his earlier idleness. Meanwhile, Sir John’s erstwhile paternal affection is also shown to be a cover for his actual interest in Jean. Over time, his avuncular mask lowers, as he takes steps to accustom Jean to the idea that they’re closer in age than would first appear (a process she encourages): “‘[L]et your friend help you if he can.’ Formerly he said ‘father’ or ‘the old man,’ but lately he always spoke of himself as her ‘friend’” (100).

Jean’s real talent is in harnessing the curiosity and delight that accompany unmasking to her advantage. She allows the Coventry family to seemingly uncover many details about her background and identity—all manufactured to elicit sympathy and piquant attraction. When she pretends to faint upon arrival, she slips into a strong Scottish brogue—“ I had the audacity to say I was but nineteen, to talk Scotch” (128)—allowing the Coventrys to seemingly draw her out about her orphan status. Later, during the theatrical tableaux, Jean puts on such a convincing disguise that Sir John’s guests are floored to discover her beneath the mask: 

‘Who is it?’ whispered Lucia, for the face was new to her.

‘Jean Muir,’ answered Coventry, with an absorbed look.

‘Impossible! She is small and fair,’ began Lucia, but a hasty ‘Hush, let me look!’ from her cousin silenced her.

Impossible as it seemed, he was right nevertheless; for Jean Muir it was (62-63). 

The final bit of detective work that Jean instigates has to do with her supposed noble birth: She orchestrates a scene that allows Sir John to imagine that he’s piecing together that Jean is the daughter of Lady Howard on his own. Jean uses these set pieces of unmasking to deflect the real discovery of her mask: Edward’s reading of Jean’s incriminating letters to Hortense. Although the Coventry family accepts Edward’s revelations as real, Sir John—the only one that matters, in the end—remains convinced by Jean’s staged ones instead.