Knight

The Cobble Knights are an order of knights from the Cobble Kingdom who protected King Mutoh. By the time of Phantom Hourglass, all of them are dead, but Link is still able to speak with their ghosts. They are instrumental in obtaining the third Pure Metal, Aquanine.

Brant
Brant, the fourth-ranked Cobble Knight, is found in his tomb on the Isle of the Dead. Once he sees that Link has the spirits of Power, Wisdom, and Courage with him, he allows him to take the Regal Necklace which allows him to dispel the hurricane surrounding the Isle of Ruins.

Bremeur
Bremeur is the third-ranked Cobble Knight, and is found in his tomb on the Isle of Ruins. He is the defender of the seal of the land. He tells Link that King Mutoh once had the pure metal, but a monster invaded his temple, awakened the king from his sleep, and stole it, enraging the king. He then creates a bridge for Link to the eastern side of the island, and his temple is used to lower the water level with the King's Key.

Doylan
Doylan is the second-ranked Cobble Knight and the protector of the King's Key that keeps the land sealed. He is located in his temple on the eastern part of the Isle of Ruins, right next to Mutoh's Temple. When Link meets him, he gives him the King's Key and tells him to use it in Bremeur's temple to lower the water level and restore the land.

Max
Max is the first-ranked Cobble Knight and guardian of Mutoh's Temple. When he first meets Link, he is surprised that a human was able to break the seal on the island, and tells Link that he needs to draw the sacred crest on the corridor door, and hints that the answer can be found by reading the riddle written on a tablet in the corridor. When Link does this, he is allowed to meet King Mutoh himself.

Trivia

 * Their names are very similar to those of the Carpenters from The Minish Cap (Bremor, Brent, Doyle, and Max).