Emotional intelligence is highly important in the UPSC interview as it demonstrates a candidate's self-awareness, empathy, and interpersonal skills. Candidates with high emotional intelligence can articulate their thoughts more clearly and respond to questions more effectively. They can gauge the mood and reactions of the interview panel, adjusting their responses accordingly. This ability to connect on a personal level can enhance rapport and leave a positive impression, indicating a candidate's potential for handling complex real-world situations if selected for the civil services.