Answer:
Mercutio is Romeos friend, the reason he met Juliet, and the reason Romeo killed Tybalt and got banished.
Step-by-step explanation:
Mercutio convinced Romeo to go to the party, and his death was the reason Romeo killed Tybalt and got banished. He got in the middle of the feud of the Capulets and the Montagues, when he was neither.