Rusl
Rusl is a good friend of Link's in Twilight Princess, hailing from the same hometown- Ordon Village- and having tutored Link in swordfighting. He has a wife called Uli, and a son named Colin- also a good friend of Link's. He gives Link his first sword (a wooden one) in Ordon Village early in the game, and is wounded in a scuffle with the monsters who took the village children. He later disappears until after the Lakebed Temple is cleared, whereupon one can meet him in Telma's Bar alongside the other members of the Resistance, albeit in an armored disguise; he will only take his helmet off and reveal himself to Link the second time he is spoken to, saying nothing initially. He has apparently been connected with the Resistance and their goal for a long time.
After completing the Arbiter's Grounds and locating the Mirror of Twilight, the band of allies who meet within Telma's Bar in Hyrule Castle Town help Link locate the missing shards of the Mirror of Twilight scattered throughout the land. Once Link retrieves the Mirror Shard from the Snowpeak Ruins and returns to Telma's Bar, he will learn that Rusl is located near the entrance to the Sacred Grove. After he finds Rusl at his location overlooking the Forest Temple, Rusl 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.