Well, OK, all of the above, especially
ideath.
In my reading of Carl Jung, anima is that part of the male psyche projected upon a female in the world. This phenomenon becomes the opening of the collective unconscious for the male so aflicted.
Archetypes come flowing out into the world as art, hence muse as actual entities, if not actually real persons.
Historically, one could look to Dante and his Beatrice, or to the notion of agape in Arthurian Mythology.