Who is he? Mercutio is one of Romeo's best friends, (the other being Benvolio) and also related to the Prince Escalus.
Mercutio first appears with the 'maskers' in Act 1 Scene 4, when he delivers his 'Queen Mab' speech and persuades Romeo to take part in the dance/party and renounce his idea of being merely a torchbearer. He next appears with Benvolio, in search of Romeo after the party.
The following morning, the same two are again in search of Romeo, who at last stumbles in and jests with them, when the Nurse (to Juliet) enters, the jesting continues at her expense.
He last appears during Act 3 Scene 1, the afternoon of the day that he is killed.
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