Quill

From Zelda Wiki.org

Quill is the kind, young and eager to work Rito who uses his superior flying abilities to be the top postman in the world. Quill looks over Link and watches him for quite a time and makes sure that he accomplishes his mission to defeat the evil Ganon. He specializes in delivering mail, as he knows the skies so well.

On Outset Island,Quill convinces Tetra and the pirates to allow Link to travel with them to the Forsaken Fortress and can be seen in the center of the Rito headquarters on Dragon Roost Island.