Fyer

Fyer is an aging man who lives on the water of Lake Hylia in Twilight Princess, as some kind of cannon businessman. On his island, he offers strange cannon rides for a small fee; one shot out of Fyer's cannon has enough power to launch Link up to the bridge over the Lake - an invaluable resource when Link has been changed back into human form with no way to warp to higher ground. Fyer, eventually, along with the badgering of Auru, an old friend of Fyer's, allows you to experience the Oasis Flight, which is a experience that launches Link from the Lake to Gerudo Desert. Talking to Fyer after talking to Auru is the only way to further the quest to the Arbiter's Grounds, a sacred dungeon deep within the Gerudo territory.

Fyer also repairs the damaged Sky Cannon in order for Link to reach the City in the Sky. Although, he does charge a rather steep 300 rupees for the job.

Trivia
Fyer has a Bullet Bill picture on his arm which is an enemy from the Mario Games.