Link (リンク, Rinku) is the protagonist of The Legend of Zelda series by Nintendo. Link is the wielder of the Master Sword and the holder of the Triforce of Courage. He appears as a main playable fighter in all three Super Smash Bros. games.
Link as he appears in The Legend of Zelda: Ocarina of TimeLink's first appearance was in The Legend of Zelda, Link was designed with a green tunic and a green hat which (like Mario's design) was due to limitations in the NES hardware. This appearance has since been traditional for Link.
One thing that has varied with Link is his age. In some games such as The Wind Waker and the first part of The Legend of Zelda: Ocarina of Time, Link is a young boy around the age of 12 whereas in The Legend of Zelda: Twilight Princess and the second part of Ocarina of Time, Link is depicted as a young adult around 17.
Because the Zelda series does not use full voice acting, we do not have much insight into Link's personality. However, it has been shown that Link is a brave and polite young man and is very "humble". Link has also received many titles throughout his adventures. Sometimes he is called the "Hero of Time" (Ocarina of Time), "Hero of Winds" (The Wind Waker), or "Hero Chosen by the Gods" (Twilight Princess).
Because of the different Links, Link's origins can vary, but almost always, he is a young boy (or man) who starts out as a normal person until learning of his destiny to save Hyrule from the evil Ganon (or Ganondorf) and as his journey presses him, he becomes a hero. In Ocarina of Time, he is a young Hylian, whose mother, before dying, entrusted him into the care of the Great Deku Tree. In The Wind Waker, he is a young boy living on Outset Island, given the legendary Hero of Time's clothes. In Twilight Princess, he is an ordinary young man working at Ordon Ranch until several of the villagers' children are kidnapped by monsters which starts his adventure.
Link made his first fighting appearance (and first official appearance) Nintendo game outside the Zelda series in Super Smash Bros., and has traditionally appeared in all installments of the series since.