This is Jakamar, Skyloft's resident
On first meeting Jakamar, he's occupying himself by fixing the gate that prevents Link from entering the rest of Skyloft. He then reminds him to pray to the Goddess over at the Bird Statue nearby, making a joke about "One in time saves nine". This information is important due to the fact the Bird Statue is your save point. After discovering Link's Loftwing is missing, Jakamar will remember seeing Groose's bird chasing his. He's unsure about their whereabouts, but he knows that Groose and his cronies are heading to the Wing Ceremony. He then tells Link to go through the academy to get down to the Plaza below.
Jakamar also fixes the windmill after Link finds the Propeller beneath the clouds.
At one point, Jakamar's daughter, Kukiel, goes missing. Link finds her in the care of Batreaux.