What distinguished feature of Cyrano de Bergerac's character influences his relationships?

The central feature of Cyrano de Bergerac's character that significantly influences his relationships is his unattractiveness due to his long nose. This physical trait profoundly affects his self-esteem and shapes his interactions with others, especially in romantic contexts. Cyrano possesses a deep intellect and eloquence, yet his obsession with his appearance creates a barrier between him and the object of his affections, Roxane. His long nose symbolizes not just physical unattractiveness but also serves as a metaphor for his insecurities and the societal perceptions of beauty that impact his ability to express his feelings openly. This internal struggle leads to a complex dynamic in his relationships, as he often resorts to self-sacrifice and deception, demonstrating a poignant human experience of love intertwined with self-doubt. Thus, it is the combination of his insecurities stemming from his appearance that ultimately defines his character and influences his interactions with both Roxane and others.