Puck is a mischievous fairy in William Shakespeare's play "A Midsummer Night's Dream" who loves playing tricks. As the antagonist, he causes much of the conflict in the play by mistakenly applying a magical love potion to the wrong characters, flipping the relationships and driving the plot. The play is a comedy and romance set in an enchanted forest in the fairy kingdom, where Puck's pranks on the lovers and Bottom create humorous mayhem.