This summary provides an overview of a longitudinal case study on the roles adopted by a master's dissertation supervisor over time. The study analyzed interviews with the supervisor and supervisee, feedback from the supervisor on draft chapters, and departmental guidelines. The supervisor adopted different roles at different stages of supervision for different purposes, showing an adaptive approach. However, the supervisor's feedback indicated a more directive style than described in the interview, highlighting the need for multiple data sources. The dangers of homogenized supervisory practices are illustrated, as supervisors need flexibility to adapt their roles to individual students' needs.