Final answer:
In the play 'Cyrano de Bergerac,' Cyrano tells Christian that Roxane is in love with him, leading to a complex love triangle.
Step-by-step explanation:
In the classical play Cyrano de Bergerac, it is Cyrano himself who informs Christian that Roxane is in love with him. This pivotal disclosure is key in the development of the love triangle at the heart of the drama. Cyrano, who is deeply in love with Roxane but feels unworthy of her due to his large nose, concocts a plan where he helps the handsome yet inarticulate Christian woo Roxane with eloquent letters and speeches, believing that this is the only way he can express his love for her vicariously.