Golden Chief Cylos

Chief Cylos is a character from The Legend of Zelda: Phantom Hourglass. He is an overgrown golden frog that serves as the leader of the Golden Frogs living throughout the World of the Ocean King.

Biography
Chief Cylos lives on the Uncharted Island, and it is from here that he leads the Golden Frogs. Chief Cylos is good friends with Oshus, and for this reason he feels eager to help Link during his quest to defeat Bellum. He gives Link the Cyclone Slate, which can be used to travel the seas much quicker than previously possible.

Theories
It is likely that Chief Cylos is somehow connected to Cyclos and Zephos from The Legend of Zelda: The Wind Waker. This is likely because they are all overgrown frogs who seem to have wind-related powers. Also, Phantom Hourglass and The Wind Waker take place in the same timeline, which furthers this theory.

It is speculated that Chief Cylos is aware of the fact that Oshus is the Ocean King due to some in-game dialogue clues.