Many New Testament texts suggest that Christian identity modifies or even replaces prior social identity markers. Early Christian communities created new relationships based on fictive kinship rendering familial identity redundant (Mk 3.35), and blood relations a potential source of hostility (Mk 13.12). Moreover, gender identity may also be subsumed within the greater category of 'Christian' (e.g. Gal. 3.28). In this paper I will demonstrate that the Passion of Perpetua follows this agenda, creating new Christian identity at the expense of Perpetua’s prior identities as wife, daughter, and mother, each of which appears to be incompatible with her identity as a Christian martyr. However, the text’s handling of her identity as a woman is more complex, culminating in her prison vision during which she is transformed into a male warrior and overcomes an adversary who represents Satan. Many commentators from Augustine onwards have read this gender-transforming vision as an indication that in order to be victorious over Satan, the final hurdle Perpetua must overcome is her identity as a woman. However, I will argue Perpetua’s female identity is not in fact obliterated by her Christian confession. When she conquers Satan through her martyrdom, she does so by her confession as a ‘Christian woman’.