Malon is a fictional character from Nintendo's Legend of Zelda series of videogames.
In The Legend of Zelda: Link's Awakening, a girl named Marin is a main character. She is a pretty red-haired girl, and it seems that she is the romantic interest of Link, the main character, in the game. Her father is Tarin.
In the next Zelda game, The Legend of Zelda: Ocarina of Time, the characters reappeared as Malon and Talon (although technically they're different characters, storyline-wise, they're named the same, look the same, and have the same personality, more or less, so it's fair to refer to them as representations of the same character). The two own Lon Lon Ranch, where they take care of Epona the horse. Malon calls Link "fairy-boy" in this game, because he has a guardian fairy. A Gossip stone in the same game says that she is waiting to be swept off her feet by a knight in shining armor. In the Legend of Zelda Manga, based on the game, this idea is expanded, and Link becomes her knight in shining armor.
(A note on the name difference: In the Japanese language, there is no distinction made between the 'L' sound and the 'R' sound in the Japanese writing system. Therefore, the difference between 'Marin' and 'Malon' is most likely due to the interpretations of two different translation teams.)
In The Legend of Zelda: Majora's Mask, Link visits an alternate world called Termina which is populated by different versions of Ocarina of Time characters. Malon has two equivalents in this world, Romani (younger sister) and Cremia (elder sister), two orphaned sisters who own Romani Ranch.
Malon then made a cameo in the Game Boy color Zelda game The Legend of Zelda: Oracle of Seasons. She had a small house in which you could visit her. Talon also makes an appearance as her father.
In the four player Zelda game, The Legend of Zelda: Four Swords Adventures for the GameCube and The Legend of Zelda: The Minish Cap for the Game Boy Advance, Malon and Talon once again own the Lon Lon ranch, although it is nothing like the ranch in Ocarina of Time.
Every incarnation of Malon has long red hair, is often dreaming of something (be it flying as a seagull, being swept off her feet by a prince, or defeating aliens who try to abduct her cows), and always has a fondness for animals.