Gully

Gully is a character in Skyward Sword. He is the mischievous son of Piper, and is shown to have an interest in insects and the nets used to catch them. He teaches Link how to roll into trees or walls, allowing the young hero to obtain the rupees and insects that fall to the ground.

Etymology
Like most other Skyloftians, Gully's name is derived from a bird, the seagull.