Stray Fairy

From Zelda Wiki.org

The Great Fairy Sisters have been split into pieces by Skull Kid in Majora's Mask. Link must gather them up, and take them to the shrine to "repair" the Great Fairy, who will aid him in his quest to save Termina.

A particular Stray Fairy needs to be caught by Link in order to get advice of the Great Fairy. It is found in the Laundry Pool in the daytime and in West Clock Town at night.