Mercutio's Teasing: Mercutio often teases Romeo for being overly romantic and lovestruck. In Act 2, Scene 4, Mercutio calls Romeo's feelings for Rosaline "a whining love-song." Through these playful interactions, Mercutio adds depth to Romeo's portrayal by juxtaposing his passionate nature with a more humorous and down-to-earth perspective. It also showcases Romeo's youthful innocence and tendency to idealize love.
Romeo's Emotional State: Mercutio's observation of Romeo's "strange love" also suggests that the young man is not in usual state. This reinforces the audience's perception of Romeo as someone caught up in an intense emotional turmoil that drives his behaviors and leads to subsequent developments in the plot.
Benvolio's Concern: Benvolio displays deep concern and loyalty towards Romeo throughout the play. He frequently attempts to guide and advise Romeo. By observing and describing Romeo's actions and inner struggle, Benvolio helps create a well-rounded portrayal of Romeo's transformation journey throughout the tragedy.
In conclusion, the comments of Mercutio and Benvolio provide different perspectives on Romeo's character, enriching our understanding of his intricate personality, changing emotions, and the emotional conflicts he grapples with as the story unfolds.