Zauz

In Phantom Hourglass, Zauz is the blacksmith who helps Link by forging the Phantom Sword used to defeat Bellum. The Phantom Sword is made of three different pure metals, Aquanine, Azurine and Crimsonine, that Link must collect by befriending the island natives and delving through their respective temples. Zauz tells Link to return in time, as the forging of the Phantom Sword is a lengthy process. Luckily for Link, he recieves a letter from Jolene that challenges him to one final duel on the open ocean. After Link defeats Jolene one last time, Zauz will be finished the sword upon returning to the island.

He provides Link a secret that proves to help him navigate further into the Temple of the Ocean King as well: by drawing an ancient symbol on a particular red door on one of the temple's many levels, he will be able to access an entirely different temple floor, and by extention, the remaining two sea charts.

When Zauz first speaks to Ciela, he indicates that he is not human; later dialog suggests he is of the Cobble race, which defended the Ocean King. He shares dark skin and a large, oddly-colored nose, with King Mutoh and his Knights. Zauz also has a large purple tattoo running over his shoulder similar to that of Baito.

Trivia
Zauz has a look nearly similar to Baito, the Postman's assistant from The Wind Waker: both have auburn hair, are bare-chested, wear shorts, and boast tribal tattoos.