This study explores how ethical and transformational leadership, through micro-level practices, shapes teachers’ moral agency, organizational meaning-making, and sustainable development. Employing a qualitative single-case study design, this research collected data through interviews, participant observation, and document analysis. The study analyzed data using reflexive thematic analysis, supported by triangulation and member checking to ensure credibility and validity. The findings indicate that leadership functions as relational praxis that connects ethical legitimacy, transformational influence, dialogue, participation, and trust. Islamic values, including amanah, adl, integrity, responsibility, and ihsan, were embedded into everyday leadership practices and transformed into meaningful actions. These practices generated Ethical-Transformational Leadership Resonance through shared interpretation, collective commitment, and relational engagement. This resonance enhanced teacher participation, professional involvement, and moral agency while strengthening shared organizational meaning and sustainable cultures grounded in trust and responsibility. The study contributes a process-based theoretical framework integrating ethical, transformational, relational, and sensemaking perspectives. Practically, the findings suggest that leadership development should emphasize ethical reflection, relational competence, participatory decision-making, and cultural responsiveness to support sustainable educational transformation.
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