In this qualitative case study, we explored students' peer interactions within their cohort and in the host countries during a short-term study abroad. Framed by Bronfenbrenner's (1993) ecological systems theory, findings revealed that students spent considerable energy reflecting on interactions with peers. The students considered themselves loners, mediators, messengers, and learners. Findings illustrate the need to attend to students' differing personal attributes and relationships with peers, as these affect their overall experiences. (Contains 1 table.)