He looks like a giant stone hawk with green eyes. His body is covered with gray rock-like feathers.
He seems to enjoy music.
Pre-SeriesTecna tells them that a legendary bird named the Roc is guarding the library. The boys climb the mountain but thanks to Sky and Riven's arguing, the Roc awakens and flies off with the guys hanging on for dear life.
The girls run to the ship and manage to calm the bird with Musa's music and let it land.