Sky King

Sky King (天空王, Tenkūō) was a Mysterious Being who rules the skies and wants to take Earth for himself.

Appearances
Sky King is a humanoid bird like being with the appearance of an aging, but very muscular old man. He has long hair, a large nose, wrinkled forehead, sharp teeth and pointed ears. He has two sets of wings on his back as well as talons on his feet and clawed fingers. He also appears to wear a small crown. His overall appearance is reminiscent to the traditional Japanese Tengu.

Personality
Sky King appears to be cruel and rather arrogant, due to his belief that he could destroy the Hero Association with ease, or at least extremely confident in his power and that of his warriors. He covets to conquer the Earth's surface.

Alien Conquerors Arc
After seeing the Sea King and Subterranean King perish, he decides he wants to take over the world himself with his four underlings: Hawk, Kite, Eagle, and Falcon. However, all four of them are killed by an unseen enemy. Before he could do anything, he perished at the hands of Melzalgald who treated him like a 'small bug'.

Abilities & Powers
It can be said that he is rather strong considering he was able to seriously jar the Hero Association headquarters. Along with his own powers, he has a group of underlings that obey his every command and all bear the name of birds.

Physical Abilities
Flight: The feathered wings sprouting from his back allow Sky King to flight in midair.

Energy Projection: Sky King has been shown to be able to direct blasts of energy from his mouth.

Trivia

 * Sky King is the fifth of many "Kings" mentioned in the series, the others being the Subterranean King, the Beast King, the Deep Sea King, the Ancient King (anime-only), the Monster King, and the Forest King.