Gulley is a character from The Legend of Zelda: A Link Between Worlds. He is the son of the Blacksmith and his wife. He would later becomes one of the Seven Sages. His design is based on the Flute Boy from The Legend of Zelda: A Link to the Past.
A Link Between Worlds
Gulley is first seen waking Link up at the beginning of the game, reminding him to hurry along to the forge before the Blacksmith gets too angry at Link for oversleeping again. Along the way, he also advises Link to give his regards to the Weather Vane, informing him that he can save this way. Shortly afterwards Gulley makes his way to a clearing in the forest.
After the completion of the Eastern Palace, Gulley goes missing and a pouch can be found in his stead at the clearing he was previously seen. After Link finds all three Pendants of Virtue and traverses Hyrule Castle, it is revealed that Yuga is the one who kidnapped Gulley because he is one of the Seven Sages and turned the young boy into a Portrait. His painting is then used, alongside those of the other Sages and Princess Zelda's, to revive Ganon. The paintings are then spread throughout Lorule. Gulley's painting ends up being taken to the Dark Palace. Link reach the Dark Palace, kill the Gemesaur King, saves Gulley, and free him from the painting. Gulley thanks him for this, though he claims to be a little confused as to what exactly a sage is, and wishes him good luck on the rest of his quest. After the last sage is freed, Gulley uses his power alongside the rest of the Seven Sages' to grant Link the Triforce of Courage. After the final battle with Yuga, Gulley is reunited with his parents.
Hyrule Warriors/Hyrule Warriors Legends
Gulley's painting appears as a part of Yuga's victory cutscene.