Hi Heather and Ellen
Ellen - ego and personality are basically two ways of referring to the same principle - also, self-image, self-identity.
That question prompted another one for me too. Is the moon's SN the ego/personalities of just the immediate past life or a symbol of an ongoing theme of egos for the soul. And also all the SN of all the planets, are they prevailing themes of all past lives or just the most immediate ones?
The south node of moon and all other planets represents the ongoing past evolution of the planetary principle as experienced over the course of a progression of lives, one life leading to the next, to the next, to ultimately the present.
With the Lunar SN it represents the ongoing evolving sense of self-image.
These pasts (of all planets) are also highly conditioned, having been distorted through thousands of years of patriarchy by now.
Remember that the moon represents what is known safe and familiar, what causes us to feel secure. Thus the tendency, down through all those past lives, the emotional nature, Moon, of what has caused us to feel secure. Generally the same from life to life to life with only small changes. That being the root of why we find it difficult to release from the past, to change in the present. Because the past represents feelings of security, as it is KNOWN. Even if what is know is dysfunctional, it is still known, familiar. The present calls us to step into what is NOT known, which tends to feel insecure, not known.
The essence of patriarchal distortion is that we have come to accept as normal what in fact is quite distorted. To the point that most people, when presented with what is actually natural, find it odd, primitive, strange, uncomfortable, not normal-feeling. Because next to nothing in modern life is natural.
Natural is giving, sharing, inclusion, cooperation. Distortion is self-interest, domination-submission, hierarchy, superiority-inferiority, etc.