Navi is a fictional fairy who acts as series protagonist Link's navigator throughout the 1998 Nintendo 64 video game The Legend of Zelda: Ocarina of Time. She was voiced by Kaori Mizuhashi. Navi performs a variety of functions within the game, including being a companion and guide to Link, providing the player with advice and being a focal point for the game's Z-lock targeting combat system. Other characters in The Legend of Zelda series have served in similar roles, including Tatl, Midna, and Fi. When designing the reticle for the game, designer Yoshiaki Koizumi made a ball of light with wings, naming it "Fairy Navigation System" before naming it Navi. She is a polarizing character, who has been criticized by players and critics for her repetitive interruptions in gameplay, particularly with the prompt "Hey! Listen!", though others have argued that she was a valuable companion in the game.