In Act I scene 2, Ariel reports to Prospero that he has performed his appointed task of creating a supernatural storm to shipwreck the ship containing the king and Prospero's brother, Antonio. He reports how all of the passengers jumped into the sea to try and save themselves, and how he has brought them safely to the island, dispersed into different groups as ordered by Prospero. When Prospero asks after the health of all those who quit the vessel, note how Prospero responds:
Not a hair perished.
On their sustaining garments not a blemish,
But fresher than before.
Perhaps Ariel is making a slight exaggeration here, as it is hardly likely that the clothes of all of the shipwrecked individuals are actually "fresher" and cleaner than before, but it does serve to highlight the way in which Ariel has used his supernatural powers to keep the passengers safe. It can also be viewed as revealing a great deal about the relationship between Ariel and Prospero. The hyperbole that Ariel uses seems to indicate he definitely wants to please his master, and perhaps that there is some fear in this relationship, as he seems to want to go over and above what he has been asked to do.