Alien (My Best Friend Is Invisible)

The aliens are an unnamed semi-humanoid species who resided on Earth after conquering it, adopting a Human-like society.

Biology
Members of this species have two heads with five red eyes, with the tops of their heads being covered in tendrils, antennas and suction pods rather than hair. The also have several long arms, and their skin is grey.

History
At some point, the species invaded Earth and enslaved Humanity. Most of Human race, reduced to endangered levels, were exported to their interstellar colonies, however some Humans developed invisibly tech to remain on Earth hidden from the invaders.

The aliens proceeded to live on Earth in manner nearly identical to that of Humans. It is unknown if their nearly identical lifestyle too Humans was either something they already had prior to their arrival to Earth, or if they merely stole this lifestyle from actual Humans.

At some point during the aliens' occupation, an alien child named Sammy Jacobs met a Human child named Brent Green, who was turned invisible by his parents to protect him. Sammy didn't know Brent's true nature until he eventually shone a device on Brent, revealing his true body. Sammy's family then took Brent away to a zoo.

Appearances

 * "My Best Friend is Invisible", by R.L. Stein (1997)
 * Goosebumps, s02e03, "My Best Friend is Invisible" (1997)