as animus is defined in A Latin Dictionary (Lewis and Short) with the phrase ‘the rational soul in man,’ then anima of course is left to pick up the irrational, emotional, and fantastic… much of what psychology has been calling ego is the animus-half of the syzygy.
Hillman argues that the classical Latin distinction between anima and animus encodes the very opposition between irrational soul and rational consciousness, and that analytical psychology’s ‘ego’ is structurally coextensive with the animus pole of the syzygy.
, Anima: An Anatomy of a Personified Notion, 1985thesis