Shiro

Shiro is a character in The Legend of Zelda: Majora's Mask and is a part of the Bomber's Notebook. He can be found injured near the entrance to Ikana Graveyard while using the Lens of Truth. After being healed with a Red Potion, he will give Link the Stone Mask.

This poor guy is so plain and boring that he's invisible. He hangs out in Ikana Valley (area between Ikana Canyon and Termina Field), waving around at those who pass by.

Trivia
Shiro is also the name of one of the carpenters rescued from Gerudo Fortress in Ocarina of Time.