Ariel

• "Imprison'd thou didst painfully remain a dozen years... thou didst vent thy groans as fast as a mill wheel strike"


  How Prospero found Ariel who was trapped

  Simile
• "to answer thy best pleasure, be't to fly, to swim, to dive into the fire"


  Ariel is a slave to Prospero and has to obey his orders

  Tricolon
• "the foul witch Sycorax, who with age and envy was grown into a hoop"

  Ariel was trapped by Sycorax

  Metaphor and imagery - 'hoop'