The term 'Queen of the Fairies' refers to two characters from William Shakespeare's play A Midsummer Night's Dream. The first is Mab, a fairy queen who appears in the play as a mischievous spirit. The second is Titania, the Queen of the Fairies and wife of Oberon, King of the Fairies. Titania is a powerful figure in the play, often clashing with Oberon over matters of love and loyalty. Both Mab and Titania are important characters in the play, and their presence helps to create a magical atmosphere.