Ciela

Ciela (シエラ, Shiera) is the first fairy companion that helps Link in Phantom Hourglass. She first met Link when he landed on Mercay Island and took him to her "grandpa", Oshus. Eventually she and Link began to travel together along with Linebeck, whom she didn't like much and often fought with.

After beating the Temple of Courage, however, instead of a colorful fairy, another white fairy much like Ciela appeared. Link went to Oshus, who used his staff to fuse the new fairy and Ciela together, revealing that she is in fact the Spirit of Courage, and Ciela turned to her true yellow color. Prior to the game's beginning, Ciela had split herself in two to prevent Bellum from sealing her away like he had with the other spirits. By collecting 10 Courage Gems and offering them at Fairy Island, Ciela can allow Link the ability to perform a Sword Beam. Collecting 20 gems doubles the width of the beam.

In the final boss fights, Ciela provides Link with Phantom Spheres, allowing him to temporarily freeze time. It is around this time that Ciela fully regains her memory as Spirit of Courage and Time. The final scene before the credits is Ciela saying her goodbyes to Link and Linebeck. She eventually gains respect for Linebeck as he does for her, and is sad to see him go.

Trivia

 * Ciela is similar to cielo, the Spanish word for "sky" (although the name can also connotate "heaven"), which is appropriate given the nature of Ciela's character to fly around the screen.
 * Because the voice used for her in the game is taken from Navi, she has been known as the New Navi (although she only uses the "Hey" and "Look" quotes).
 * Additionally, because early trailers for the game featured said quotes yet did not show Ciela's name, many fans initially believed she was Navi.