This paper aims to investigate the social innovation process in the innovation ecosystem of the Tampere region, taking the energy sector as an example. It focuses on analysing how responsible research and innovation (RRI) activities are understood by regional stakeholders, particularly regarding how the roles of different actors (universities, public agencies, industry, and citizens) are constituted, and how different actors facilitate social innovation. The research questions are approached by the conceptual framework of Quadruple Helix which is useful for understanding the roles of citizens and interwoven fabric in innovation ecosystems, including social innovation. Empirically, the paper is based on analysing qualitative interviews with 12 stakeholders in the energy sector in Tampere. It is supplemented by analysing national and regional documents related to energy policies and the role of research and universities as well as citizens in sustainable (economic) development. Based on our findings the responsibility in research and innovation activities is not defined by utilising existing conceptual approaches or EU policies, such as RRI.