In counseling supervision, leadership is often associated with supervisors' skills, role, position, and responsibilities. However, supervisees need to learn and practice how to lead also: for example, how to promote others' well-being, how to support, and advocate for others and self. Graduate supervisee relational leadership in the mental health professions is an intrinsic part of the purposive aspect of counseling supervision. Relational leadership in graduate counseling supervision is a purposive, interpersonal, facilitative, growth oriented, and process-based service in which leaders -- expert facilitators and mentors -- seek to cultivate leaders, not followers. Relational leadership is mutuality-affirming and mutuality-promoting (e.g., open dialogue, mutual respect, inter-beneficence). My objective for the proposed study is to provide a critical interpretive synthesis of the relevant and relatively recent scholarly literature on this topic. The aim of my critical interpretive synthesis is to explore critically the theoretical underpinnings, theoretical implications, and emerging theoretical directions that follow from the conducted interpretive study. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]