Mercutio feels anger and dislike for Tybalt. Tybalt often displays vengeful conduct by calling out his fury and disgust. He even challenges Romeo Montague to a duel. Mercutio and Romeo are best friends. When Romeo refuses to fight Tybalt, Mercutio takes his place.
Mercutio notifies Romeo early on of the devastation his love for Juliet Capulet could bring, but he pays no heed. Mercutio’s primary concerns are peace between the Capulets and the Montagues and Romeo’s wellbeing. However, this duel ends in tragedy for both families because Juliet and Tybalt are cousins. First Mercutio is killed by Tybalt, and then Romeo slays Tybalt.