In that analogy, gravity is the Appreciation of the Relationship Story Throughline. Gravity between the Earth and the Moon is Storytelling.
We use terms like mentor/mentee because there usually aren’t words in the English language that accurately describe that kind of relationship. The duality is not part of the definition.
Strictly speaking, the Main Character and the Influence Character are not part of the Relationship Story Throughline (he said/she said encoding). The relationship is key—which is why it is always in flux. Either growing closer together or moving apart.
Linear thinkers like to think relationships are stable when they are static—they’re not. And when they do think this way, they usually get themselves into trouble. (I thought everything was fine!)
Although the relationship between the earth and the moon appears stable, it is constantly falling into the Earth—and imperceptibly moving away all at the same time.
The relationship expressed in the Relationship Story Throughline is the gravitational ebb and flow—not how the Moon feels about the Earth, or how the Earth thinks of the Moon.