Group co-leadership requires facilitators to effectively work together to produce positive group outcomes; however, there is a paucity of information about how the co-leadership relationship develops. In this modified consensual qualitative research study, we explore the development of the group co-leadership relationship in doctoral-level trainees. Five doctoral student co-leaders facilitating experiential learning groups completed reflection journals on their leadership experiences. Findings revealed five relational dynamic themes experienced amongst co-leaders in leading an experiential training group. The primary implications from these findings can assist counselor educators in the training of group leaders.