Hyudoro (Sonic the Comic)

The Hyudoro is a character that appears in the Sonic the Comic series published by Fleetway Editions. They are a breed of ghost inhabiting the Lost Pyramid of Sandopolis. A part of the pyramid's curse, they attack any thieves under the veil of darkness.

Appearance
The Hyudoros change their forms according to the level of darkness in the environment. When the light is just dimming, they appear as little more than glowing blobs, but as the darkness intensifies, the evolve into while cloaked specters with four-fingered hands, sharp horns, empty black eyes and large jaws with elongated sharp teeth.

History
When Captain Plunder, Filch and the Per'fessor attempt to leave the Lost Pyramid of Sandopolis with several bags full of its treasure, the Hyudoros began materializing as the ancient lighting system started to fail. Although Filch saw the ghosts, he was ignored by Plunder until the Hyudoros fully materialized in front of them. These leering phantoms chased the pirates out of the pyramid, which sealed shut behind them, with the treasure left inside.

Personality
The Hyudoros are described as the "the wrong sort of ghosts", making it impossible to reason with them.