Gondo is a character from The Legend of Zelda: Skyward Sword. He is the owner of his family's Scrap Shop in Skyloft's Bazaar. For a fee, Gondo will use treasures that Link has obtained in order to upgrade his items. He also offers to fully repair Link's shields for ten Rupees each, regardless of the damage they have sustained. Gondo also possesses the inactive remains of his grandfather's robot LD-301S Scrapper. Gondo spends a great deal of time attempting to repair Scrapper; eventually, Link gives him an Ancient Flower, thereby allowing him to successfully repair Scrapper. If Link talks to him at night, Scrapper reveals to Link that Gondo is building a washing machine for his mother.
If Link tries to upgrade an item while missing a single type of treasure or not enough of one type of treasure used to upgrade it, then he will provide a helpful hint on how he can obtain said treasure (such as pointing out that Dusk Relics can be found in the "world of the spirit"). Most of this information comes from his grandfather's notes.
After obtaining the Goddess Whitesword, asking to Gondo to upgrade some equipment and then choosing not to have any items upgraded (or successfully upgrading an item) will unlock the ability to Dowse for Treasure.
As many residents of Skyloft seem to be named after birds, it is possible that Gondo is named after the condor.