Orsino is a character from William Shakespeare's play, Twelfth Night. He is the Duke of Illyria, known for his romantic and melancholic nature. Orsino is infatuated with Olivia, a noblewoman who is mourning her brother's death and has sworn off love. His unrequited love leads him to express his feelings through poetic and dramatic soliloquies. Throughout the play, Orsino's character embodies themes of love and desire. He often reflects on the nature of love, oscillating between passion and despair. As the story unfolds, his relationship with Viola, who disguises herself as a man named Cesario, adds complexity to his character and the overall narrative.