The term ‘girl’ in the depth-psychology corpus operates across at least four distinct registers, none of which is reducible to mere biography or developmental stage. In its archetypal register, the girl figures as the puella aeterna — the eternal feminine principle of innocence, enchantment, and unguarded expectancy — whose psychological dangers Signell, Harding, and von Franz all trace with precision. In Harding’s Jungian-feminist anatomy, the girl-type designates a developmental arrest in which feminine libido is colonized by masculine expectation: the girl who becomes ‘nothing but a psychological function of the man.’ Von Franz maps the girl’s fairy-tale incarnations — the white girl, the princess, the seduced innocent — as projective screens for unconscious anima dynamics in the puer aeternus configuration. Winnicott introduces a clinical refinement largely absent from the Jungian tradition: the ‘split-off girl element’ in a male patient, a dissociated contrasexual nucleus whose recognition is prerequisite to genuine selfhood. Estés recovers the girl as a mythopoeic presence — the child compelled by red shoes into uncontrollable instinctual dance — reading her predicament as the archetypal cost exacted when instinct is shamed and suppressed. Across these positions, the girl marks a contested threshold between unconscious nature and developing individuation, between archetypal possession and earned selfhood.