Background: It is widely recognized that the engagement of older adults with multimorbidity and their caregivers as partners in health care research is important and invaluable. Objectives: The objective of this study was to examine how researchers can best engage and support older adults with multimorbidity and informal friend or family caregivers of older adults with multimorbidity as research partners in health care research teams. Methods: The persona-scenario method was used for participants to create fictional stories. These stories were analyzed to shed light on specific strategies that can support older adults and caregivers as partners on health care research teams, such as a patient-centered approach, identifying and addressing barriers to engagement, and clarifying roles and responsibilities on the research team. Results and conclusions: The results from this study can be used to inform research, policy, and education on supporting older adults with multimorbidity and caregivers of older adults with multimorbidity as research partners.