Marin is a girl and finds Link washed up on Koholint's shore. Link awakens in Marin's house after she brings him back from the beach. Groggily, he mistakes her for Princess Zelda, but soon learns what has happened. Marin teaches Link the "Ballad of the Wind Fish", and also takes Link as an escort to the Animal Village, where she helps him enter Yarna Desert. If the player completes the game without losing a life, the Wind Fish grants Marin's wish to fly to other lands. In the original version, she is given wings, while in the DX version, it is implied that she was transformed into a seagull. Marin and her father Tarin bear a striking physical resemblance to Malon and Talon from Ocarina of Time.
Source: Wikipedia, "Characters in The Legend of Zelda series," available under the CC-BY-SA License.