The Legend of Zelda: Majora's Mask Walkthrough

Majora's Mask p.7

Bubble Blast
Enter the cave in North Clock Town to meet the Great Fairy, who was shattered into pieces due to the Skull Kid. In order to restore her to her true form, you'll have to find the missing Stray Fairy and return it to her. This acts as a tutorial to explain Stray Fairies, a collectible you will be seeing quite a lot of throughout your journey. This one's location varies depending on what time of day it is.