Context from CW12 - Visual impression + Jung’s commentary:

6, VISUAL IMPRESSION, DIRECTLY FOLLOWING UPON 5:

[64] The veiled figure of a woman seated on a stair.

[65] The motif of the unknown woman—whose technical name is the “anima”(7)— appears here for the first time. Like the throng of vague female forms in dream 4, she is a personification of the animated psychic atmosphere. From now on the figure of the unknown woman reappears in a great many of the dreams. Personification always indicates an autonomous activity of the unconscious. If some personal figure appears we may be sure that the unconscious is beginning to grow active. The activity of such figures very often has an anticipatory character: something that the dreamer himself will do later is now being done in advance. In this case the allusion is to a stair, thus indicating an ascent or a descent (fig. 14).