Assuming this is the RS Throughline
The OS premise will be something like, everyone wins when you stay self aware. (Psychology, the OS is the "SENSE OF SELF"ultimately> Desire vs Ability.
A subpremise (RS) would be more holistic about balancing change and inertia. The RS is the physics realm, esp in light of Understanding>Conditioning. Physically getting your body on board with understanding something about change and inertia.
When the OS is in manipulation, I find it hard to differentiate how psych is less personal and more everyone. But here's my try.
Emmet and Rex: Who I am Present and Who I am Future (relationship of me to potential me) Do I stay the same (inertia) or change?
Emmet and Lucy: Who I am Present and Who you want me to be (friends to potential lovers) Do I stay the same (inertia) or change?
But we also have these relationships....
Boy and Sister: Can't we all get along? The relationship is very different feel than the above two. But still...Do I stay the same (inertia) or change?
Queen Whatevra Wannabe and Batman: Can't we all get along? Do I stay the same (inertia) or change? Look at the Queen's name. Her name holds the debate.
Boy/Batman: NEVER (change)
So, I wonder if the interplay between the last two pairs is more like the fight WITHIN Emmet between his Desires (for love, for peace) and Abilities (master-punch, breaking vs building).
If that's the case, the relationships are not RS but parts of the story encapsulating the Ability and Desire OS elements.
Boy/Batman: Ability (master-punch vs master-build)
Once Ability is informed by Sense of Self, Desire proves her ability to "brainwash" Ability to become Conceptualized Ability.
What do you think?