Fado is a character found in The Legend of Zelda: Ocarina of Time for the Nintendo 64. She is a Kokiri. As a child, she'll teach Link how to look around. In the actual game, the name Fado is never used, but rather the developers apparently gave her this name while creating the game.
Interestingly, Fado has her own model in the game, contrary to most of the characters who are copies of one another with minor differences.
It has been speculated that Fado and Mido are siblings, though this has been unconfirmed.