Link, seen here in his Twilight Princess rendition, is a fierce fighter in all Legend of Zelda games.Link is the protagonist from Nintendo's Legend of Zelda video game series. Link was created by Shigeru Miyamoto, and first appeared in the 1987 game The Legend of Zelda. Introduced as a generic sword-fighting hero, the character was typical of fantasy adventure games. However, later Legend of Zelda titles revealed significantly more details about him. The game's success—over 6.5 million copies sold worldwide[1] (#wp-endnote_optigamer)—and that of its numerous sequels made Link one of Nintendo's best-known characters. Link is named for the "link" the player shares with the hero of each game[2] (#wp-endnote_linkwithplayer).
A peculiarity of the character is that there are several different incarnations of Link throughout the whole Legend of Zelda series, although they share a number of distinctive characteristics. The existence of multiple Links is made obvious on many occasions in the games; for example, the introduction sequences of Legend of Zelda: The Wind Waker and Legend of Zelda: The Minish Cap refer to an ancient, legendary champion, identical in appearance to Link. Miyamoto confirmed that there were multiple Links in late 2003. However, the exact chronology of the Legend of Zelda series is subject to debate among fans, and apart from a few fairly clear pairings (see Link's incarnations section) it is uncertain which of Link's incarnations appears in each of the games (see Legend of Zelda series for a discussion of the controversy surrounding the chronology of the games).
Common attributes of all "Links"Link is a courageous boy or young man—it is unlikely that his age ever exceeds 19 years at any point in the series. In Legend of Zelda (LoZ) games, he usually leaves his home and relatives at an early age to pursue his destiny and fight Ganon, his archenemy, or other servants of evil. In almost all LoZ games, except for Zelda II: The Adventure of Link and the upcoming The Legend of Zelda: Twilight Princess, Link is a child when he begins his quest. This is made clear through Link's body dimensions in the 3D games and by his lack of sexual awareness: when certain characters exhibit sexual behavior in parts of some games, Link is taken aback, rather than tantalised.
Link's adventures mostly take place in his native kingdom of Hyrule, although The Legend of Zelda: Link's Awakening, The Legend of Zelda: Majora's Mask, The Legend of Zelda: Oracle of Seasons, and The Legend of Zelda: Oracle of Ages are set in other locales. Link is closely associated with the Triforce of Courage and thus with the goddess Farore and her color, green. Recovering the Triforce of Courage is a key part of some LoZ games like The Adventure of Link and The Wind Waker."
This entire thing was quoted from answers.com. I needed to fill some space up, what can I say?