The puella aeterna would be the 'eternal daughter' type of woman, one who is unconsciously identified with the anima of the father. Such a woman lives, as does the Jung man of the puer type, in an archetypal role.
Von Franz establishes the puella aeterna as the precise feminine counterpart to the puer aeternus, defining her structural identity through unconscious identification with the father's anima and thus inhabiting a Kore-goddess role divorced from personal selfhood.
, Psychotherapy, 1993thesis