Link (Legend of Zelda)
Link is the fictional protagonist character from the Legend of Zelda game series. Consistent attributes of Link include wearing a green cap and tunic, carrying a sword and shield, and being left-handed.
There are several Links in the whole series. In most time-lines, the first Link is the one in the The Legend of Zelda: Ocarina of Time, who also appeared in the Super Smash Bros. series. Below are synopses of the different Links' adventures.
Link in Ocarina of Time
At a very young age, when war struck Hyrule, Link's mother took Link to the safety of Kokiri Forest under the protection of the Great Deku Tree. She passed away and Link was brought up by the childlike forest Kokiri. Unlike the other Kokiri, he didn't have his own fairy companion, until Navi was sent to him by the Deku Tree. Link had to save the Tree from a curse put on it by a giant arachnid, Queen Gohma. After saving the Deku Tree he went to see Princess Zelda at Hyrule Castle. She put him on a mission to get the three Spiritual Stones and save Hyrule. After he got the stones, he went to the Temple of Time, opened the Door of Time with the Stones and the Song of Time, and drew the Master Sword from its stone pedestal. It locked him in time for seven years while Ganondorf, the Prince of Evil, took control of Hyrule. Link had to release the six sages from their temples, so they could lock Ganondorf away into the Golden Realm. After he had saved the sages, Zelda was captured and he had to fight Ganondorf for the last time.
Link in Majora's Mask
(This is implied to be the same exact Link from Ocarina of Time)
Link defeated Ganondorf and left Hyrule to search for his lost fairy, Navi. His horse was stolen by a Skullkid controlled by an evil mask. While chasing the skull kid, Link accidentally ended up in an alternate reality called Termina. He had to save the land from the mischief of Majora's Mask, who has manifested its power in the moon and forced it to crash into Termina in 3 days. Link must use his trusty Ocarina of time and a song which sends him back to the start of these Three Days, re-using time to save Termina from the Mask, along the way finding magic masks of his own, allowing him to transform into a Goron rock-man, a petite Deku and a graceful aquatic Zora, and the all-powerful Fierce Deity's Mask, making Link almost as powerful as Majora.
Link in The Legend of Zelda
In this game, Link's character is not described in detail. He is mostly a generic hero character attempting to rescue Princess Zelda (and her kingdom, Hyrule) from the evil wizard Ganon. He begins the game as a green-clad elfin boy with a shield but no weapon, and gradually gathers equipment and shards of the Triforce of Wisdom until he is powerful enough to defeat Ganon and free the Princess. Later-released Zelda games suggest that this game's Link and Zelda are reincarnations of the originals who are called forth because Ganon had become free again. The reincarnation theory is given backing in the "Wind Waker" title, in which Hyrule is a long-gone land of myth, flooded following an attack by Ganon while Link was searching for Navi during The Legend of Zelda: Majora's Mask, and s boy is the reincarnated spirit of Link to save Hyrule from Ganon.
Link in Zelda II: The Adventure of Link
(This Link is generally considered to be the same Link from The Legend of Zelda)
The Triforce sends Link on a mission to another world, Holodrum, to stop the disruption of the seasons by the General of Darkness, Onox.
(This Link is the same Link from Oracle of Seasons)
The Triforce sends Link on a mission to another world, Labrynna . He must stop Labrynna from being taken over by the time-travelling Sorceress of Shadows, Veran.
Link is called upon to save Hyrule 100 years after the original locked Ganon into the Golden Realm. The evil wizard Aganihm frees Ganon from the realm, which has now become evil from Ganon's terrible influence. Link must collect the three medallions and save the seven maidens descended from the six sages and Princess Zelda, while travelling through both the Light and the Dark Worlds of Hyrule.
Exploring the world, Link's ship is washed up on a mysterious island called Koholint. He can only escape by waking the Wind Fish, who has dreamed the island into existence... or maybe Link dreamed that the fish had dreamed him? This is considered to be reminiscent of the Red King in Through the Looking-Glass.
A young boy, with no blood relation to the previous Hero of Time, rises again to fight evil years after the The Legend of Zelda: Ocarina of Time and The Legend of Zelda: Majora's Mask games, when Ganon has flooded Hyrule, and a new kingdom has been formed on the Great Seas, with only mountain-tops of Hyrule becoming land. The kingdom of old, resting dormant under the sea, is now only a legend that lives on in scrolls and memory.
In the beginning of the game, Link's younger sister Aryll is captured by the Helmaroc King (a giant masked bird), mistaken for someone else with golden hair and pointy ears. In order to save his sister, Link travels to the corners of the earth to recover his sister and defeat the shadowy power in control of the bird. He finds his quest intertwines with another, and Link becomes the Hero of Winds. Using the Windwaker, a magical conductor's baton (often likened to a magic wand of sorts) to borrow the power of the gods to aid him in his quest. The wand's user interface is similar to that used for the ocarina of time, but adds tempo as well as pitch to form tunes.
It is widely discussed what relation Link has to the Hero of Time, but the most reasonable explanation is that since the Hero of Time used the same shield as the Hylian knights, and the tradition in his hometown is to hang the family shield on the wall, Link is actually a descendant of a Hylian knight. Whether he is the hero reincarnated is not known for sure. He aids the pirate Tetra in finding her true destiny as the Crown Princess of Hyrule, Zelda. The true heir to the Hyrulian royal family also aids him in his quest to awaken two sages and seal the great evil sorcerer Ganondorf under the sea.