The Eyed Balloon

"The moon was a giant eyeball, and the lid had just opened. It looked exactly like Odilon Redon's 'The eye like a strange balloon goes to infinity' or Mizuki Shigeru's faux American yokai, 'Backbeard'."

- Joji in JORGE JOESTAR Chapter 10: The H.G. Wells

The Eyed Balloon (アイドバルーン Aido Barūn) is a living phenomenon in space from the light novel JORGE JOESTAR. It is suspected to be Mars’ third moon but is revealed to have been created by Kars, who holds it while running laps around Mars.

Appearance
The Eyed Balloon is described to be a five-kilometer long sphere. With an eyeball at the center, and appears to have large eyelashes. It is made out of stone and doesn't appear to have any craters. It is able to create tentacles, and contains 36 Giotto's probes inside of it. It is located about eight kilometers above Mars, near its atmosphere.

2012
Jorge looks out the window and notices a third moon just above the atmosphere of Mars. Funnier Valentine report the discovery and try to find the connection between the moon and Morioh and Nero Nero Island. As Soundman tries to examine it with his sand, they take a picture of what seems to be branches. They learn that the moon has a large number of tentacles and that it is trying to approach the ship.

The crew find another photo featuring a long-haired, half-naked man with horns on his head who is holding some sort of rope in his hand, which is connected to the Moon. They learn that he had been hiding the moon behind Mars by running with it like a balloon at a inhumane speed. Soundman's sand reaches the moon, Narancia uses U-Boats periscope to scout to see if the moon is active. They suddenly discover that the moon has a large eyeball that had just opened. it then attacks the ship with its tentacles, Narancia attempts to defend the ship using torpedoes to attack the tentacles. This fails as the eyeball opens a strange mouth and swallows all of the attacks.

The current President of the United States, The Funniest Valentine, makes an announcement on the loudspeaker. He explains about the emergency meeting that is currently held in New York about the mysterious Eyed Balloon. He sends them some closeup photos of the Eye, showing some Giotto probes floating near it. He warns them, giving them only a mere ten minutes to escape from the Eyed Balloon, or they would have to blow up the ship to avoid having it and the mysterious man reach Earth.

As Funnier Valentine betrays the crew, kills them, and is later on killed from the ship exploding, Joji and Narancia aboard a giant U-Boat. The mysterious man known as Kars enters the ship. He introduces himself, and later creates a special ship using the Eyed Balloon and the Giotto probes so they can all return to Earth faster. He then explains that the Balloon was created from thirty-six parallel Kars' from other universes after the universe had died and restarted thirty-six times. For every loop, Kars had been defeated by Joseph Joestar and was sent to space because that had been his fate; because of this, he ends up finding other versions of himself. The Kars' build a ship using their bodies and the Giotto probes, the leader Kars uses the rest of the parallels Kars' as fuel. As they successfully build the ship, they fall down to Earth with the Eyed Balloon. It eventually burns up as they approach land.