Proxi

Proxi is a Fairy in. She accompanies Link and speaks on his behalf.

Biography
Proxi speaks on behalf of Link, hence her name. She meets Link in Hyrule Field during "The Armies of Ruin" Scenario while the Dark Forces are invading the kingdom, and accompanies him after he saves her from a horde of Bokoblins. Throughout the game, She offers information and encourages troops, and even expresses concern for Link when Ganondorf first defeats him after his resurrection.

In the Majora's Mask DLC, Proxi also speaks on behalf of Young Link, albeit with different lines more akin to Tatl however

Nomenclature
Proxi's name comes from the word "proxy," meaning "the authority to do something in another's behalf." Proxy takes the role of Navi in Hyrule Warriors, and speaks on Link's behalf in battle.