Rusl

Rusl is a good friend of Link's in Twilight Princess. He gives Link his first sword (wooden!) back in Ordon Village early in the story.

After conquering the Arbiter's Grounds and locating the Mirror of Twilight, a band of allies meet within Telma's Bar in Hyrule Castle Town, in order to locate and make aware to the public of the locations of the last four twilight mirror shards, scattered throughout the land. One of these men is Rusl himself, though in an armored disguise. Every time Link ventures back into Telma's Bar to figure the location of the next temple, Rusl will only grunt, but if spoken to a second time he will remove his helmet and reveal himself to Link.

After the Mirror Shard of the Snowpeak Ruins is retrieved, Link will learn back in Telma's Bar that Rusl is located near the entrance to the Sacred Grove. Once Link finds Rusl at his location overlooking the Forest Temple, he reveals himself. He gives Link a golden Cucco to use to reach the Sacred Grove, the precursor to the ruins of the Temple of Time and the temple itself.