Adolescents with prosocial purpose focus on their friends, family and community to develop their identity and maintain positive future expectations. During the COVID-19 pandemic, prosocial purpose may have acted as a source of resilience for teens, especially Peruvian adolescents who faced extreme stress during a uniquely strict lockdown. The aims of this mixed-methods study are to 1) quantitatively investigate gender and school-grade differences in prosocial youth purpose across adolescence and 2) qualitatively describe whether Peruvian adolescents perceive that the pandemic transformed their sense of purpose. Findings show that girls had higher commitment for beyond-the-self goals than boys, there were no school-grade differences in terms of frequency of endorsement of self-oriented goals or beyond-the-self goals. I found that half the students reported that the pandemic had made them shift their goals and perspectives. These findings provide further information on the impacts of COVID-19 on adolescent mental health in underserved populations like Peru.