This companion note expands the Dual-Field Interface Model (DFIM, ver 3.4) to address the physical origins of free will. By analyzing the quantum-mechanical transitions at the membrane interface between positive and negative bulk fields, this paper proposes that agency is an emergent property of non-adiabatic Landau-Zener transitions. Key Theoretical Contributions: The Adiabatic/Non-Adiabatic Duality: The note mathematically maps biological "habit" to adiabatic processes (deterministic adherence to energy surfaces) and "active choice" to non-adiabatic interface leakage (probabilistic jumps under high strain, where $|\dot{\rho}_m|$ is large). Microtubule Resonance: It bridges the gap between cosmic fields and biological systems by proposing that microtubules act as "resonant cavities" for the interface scalar field ($\psi$), localizing quantum indeterminacy within neural structures. Cosmological Alignment: Building on Hawking-Hertog top-down cosmology (discussed in DFIM Note 2), this model suggests that observer "choices" act as Spontaneous Symmetry Breaking (SSB) events, retroactively stabilizing bio-friendly physical constants. Cosmic Implications: The paper introduces a "Coherence vs. Stability" paradigm, predicting that regions of loose interface tension (cosmic voids) may allow for higher indeterminacy ("freedom") at the cost of lower structural coherence ("sanity"). Predictions: The model predicts specific spectral signatures (frequency shifts linked to decoherence times of $\tau \sim 10^{-16}$ s) in quantum decision models, distinguishable from thermal noise in isolated resonance experiments. Context: This is Note 7 in the DFIM series, providing an interpretive extension to the core mathematical thesis without requiring modification to the fundamental equations of the framework. Keywords Dual-Field Interface Model, DFIM, Free Will, Quantum Gravity, Landau-Zener Transitions, Consciousness, Microtubules, Spontaneous Symmetry Breaking, Top-Down Cosmology, Hawking-Hertog, Quantum Biology, Emergence.