The Council is a crucial intergovernmental institution of the European Union. However, the complex, opaque and consensual character of the decision-making process in the Council puts its legitimacy into question. Intergovernmentalist theory posits that it is sufficiently legitimised, indirectly, by the member state governments. Constructivist research, on the other hand, suggests that socialisation might disturb the relaying of positions from the national to the supranational level, as the former approach implies. This paper aims to explore these issues, in particular related to representation and consensus. It contains an analysis of material generated in in-depth interviews and concludes that more effort is invested into reaching a more inclusive compromise in the Council than one would expect if it were to decide by qualified majority. Socialisation is weakening the input legitimacy of decisions made in the Council, while at the same time enhancing their output legitimacy by favouring genuine consensus.