Link, contrary to the title of the series The Legend of Zelda, is the main character and the main hero in the Zelda franchise games. Link is usually depicted wearing a green tunic with a green floppy hat. Throughout the many games released, there have been many Link's throughout the history of Hyrule that rose up to the challenge of saving the world from evil, mainly from the wrath of Gannondorf, the King of Thieves. However, in the stories of Ocarina of Time and Majora's Mask, it is the same Link who we see.
Link is depicted as courageous, bold and although he is never seen to speak in the game, he shows no shyness in the manga as he is seen chatting quite a lot. From his speech, we can see that Link is also a curious person who once he has a goal in mind, will set out and achieve it at all costs.
Our Hyrule savior, so far to our knowledge, has been the only one to wield the Master Sword, the evil-banishing sword that is also the only known weapon to defeat Gannon, as is seen in Ocarina of Time. His swordsmanship is unparalleled throughout the land of Hyrule and he wields his weapons in his left hand.
Link was raised by the Kokiri in Ocarina of Time and after a prophetic dream and guidance from his guardian, the Great Deku Tree, he sets out to collect three spiritual stones, travel 7 years into the future to defeat Gannondorf and rescue Princess Zelda. After being sent back in time following the defeat of Gannon, Link leaves the land of Hyrule and ventures into the land of Termina to search for a lost friend (his fairy Navi), where he defeats an evil mask (Majora's Mask) by reliving the same three days over and over again.