This study examines two learners’ individual accountability in one presentation group with five learners (A, B, C, D, and E), who were not fully aware of their specific roles as individuals. Two learners’ individual accountabilities are analyzed qualitatively through their interview survey answers from the perspective of cooperative learning. The following are the results: 1) Student D served as a facilitator but did not perceive it as his/her role, 2) Student E was not aware of his/her role and did not demonstrate his/her competence, and 3) Introducing in advance such roles as “facilitator” and “follower” and the competences needed to fulfill these roles would help our learners to demonstrate their abilities and take the initiative.