In this study we attempt to understand some of the aesthetical features implemented by Arrigo Boito (1842-1918) for the dramaturgic formation of the final act of the opera Mefistofele. Doing that, we will focus on the bifocal character of Helen, both as flash-and-blood woman and as the divine Queen of Troy. Disregarding the controversial criticism of the value of the music, the analysis below reveals deep concern for the dramatic coherence practiced by musical associations and cultural signals. It shows that the composer has sincerely made an effort to characterize both facets of Helen-i.e. femininity and Royalty in the manner of collision of contrasts- Coincidentia Oppositorum. That special polar aesthetic approach constitutes a convincing musico-dramatic whole made out of extremes.