Red Eye

The "Red Eye" was a meteor-like device that threatened Beach City in "Laser Light Cannon". In "Marble Madness," it is revealed that it was a device built and used by the Gem Homeworld to detect Earth-habitant Gem life.

Appearance
The Red Eye, as its name entails, is a massive, metallic, red-orange eye. It is spherical in shape and most of its features are composed of straight lines. The Red Eye has a light orange hexagonal iris with an red-orange pupil of the same shape, that can act as an aperture that can be dilated or constricted. Its body (or sclera) is orange and is covered by cream colored covering (or eyelid) that can close and open to protect the eye. It seems to be constantly emitting light and appears to be covered in a white covering.

Abilities
Although massive in size, it has the ability to defy Earth's gravitational pull and is able to levitate freely anywhere. It is also very durable, having a very hard body which provides great defense against attackers and taking multiple hits without even leaving a scratch or a dent on it. Its aperture-iris can open up and can create a powerful vacuum that has the capability to suck up anything outside it.

History
Its first appearance is in "Laser Light Cannon", where it threatens Beach City with its potential of colliding and killing all of Beach City's residents. Pearl, Amethyst, and Garnet try multiple times to stop it by throwing Amethyst at it, which fails. It cannot be destroyed without Rose Quartz's Light Cannon, which Steven finds. He and the Gems use it to destroy the Red Eye, sending pieces of it all over Beach City.

In "Marble Madness" Peridot revealed that the Red Eye was a scout sent to Earth by Gems, presumably to ascertain as to whether or not there were Gems present on earth

Trivia

 * The Red Eye may have been inspired by Ramiel or Leliel, Angels from Neon Genesis Evangelion. It is spherical like Leliel and geometric like Ramiel, and shares both Angels' large slowly-floating floating object traits.
 * Ian Jones-Quartey, creative director of the show, stated on his blog that the Red Eye is not a Gem.
 * The Red Eye could be Yellow Diamond technology sent to inspect earth, realising the Crystal Gems could destroy it with the Light Cannon, future ships like the Gem Warship is designed to deflect Light Cannon blasts.

Gallery
Red Eye