Rusl

Rusl is Link's mentor in Twilight Princess, hailing from the same hometown - Ordon Village - and having tutored Link in sword fighting. He has a wife named Uli, a son named Colin, and an unnamed baby girl. He gives Link his first sword (a wooden one) in Ordon Village early in the game, and also crafted the Ordon Sword Link used before obtaining the Master Sword. He is severely wounded in a scuffle with the monsters who took the village children. While Link is in his Wolf Link form, Rusl searches the village one last time- and if he sees Link he will mistake him for a monster and attack Link with his sword when Link either gets close to Rusl or gets near Uli, saying, "Foul beast!" each time Link gets near. 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, although 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.

Trivia

 * Rusl shares some similarities with Link's Uncle from A Link to the Past. They are both swordsmen who serve as Link's mentors, both were wounded during the game, they have the same in-game hairstyle, and both have facial haires' color different from their hairs' color in-game.
 * Rusl and Guard Captain Russell from Spirit Tracks have similar names. Also both are the ones who give Link his first sword and teach him how to fight in their respective game.