In 'A Midsummer Night's Dream', the fairy queen is Titania.
Titania is the wife of Oberon, the fairy king, and rules the supernatural world of Shakespeare's play. Their quarrel over an Indian changeling boy disrupts the natural order: Titania says their conflict has brought unusual weather and harmed the fertility of the human and natural worlds. Their argument helps set the play's magical confusion in motion.
Oberon orders Puck to use a magical flower on Titania. Under the spell, she falls in love with Bottom, a weaver who has been transformed so that he wears an ass's head. The comic enchantment is eventually reversed, and Titania and Oberon reconcile before blessing the marriages at the end of the play.
Puck is Oberon's mischievous servant, not the queen; Bottom is the enchanted craftsman; and Oberon is Titania's husband. Shakespeare probably drew the name Titania from Ovid's 'Metamorphoses', where it is used for a daughter of the Titans.