Snow Wildsmith of ICv2 described the series as having "younger characters do not want to stick to the roles their parents proscribed for them and most of the women are tired of being told that they are the lesser sex." Mautner wrote that "if there's a central theme in "Princess Knight", however, it's not that of sex roles but of parental expectations and filial duty". Drazen also exposed that the series deals with "another classically Japanese pair of opposites: duty and desire." Drazen said "she doesn't resent her duty" of having to be a boy and have fun with it, but that "only in private does she live out her feminine desires." Mautner expressed a similar view, affirming that even if she likes to be a boy "possesses a strong desire to indulge her female side."