Aperture Science Weighted Companion Cube

"The Enrichment Center reminds you that the Weighted Companion Cube will never threaten to stab you and, in fact, cannot speak. In the event that the Weighted Companion Cube does speak, the Enrichment Center urges you to disregard its advice."

-GLaDOS

Origins


The Aperture Science Weighted Companion Cube, (most commonly known as the Companion Cube), is a special storage cube that is given to you in the beginning of test chamber 17. This cube is different from the other cubes that you frequently use because there is a pink heart printed on each side of the cube. GLaDOS introduces the cube to you by promising that it will "never threaten to stab you" and also "cannot speak" and if Chell did hear it talking, she was hallucinating.

Destruction
At the end of test chamber 17, Chell comes upon an incinerator. After congratulating Chell, GLaDOS tells her that in order to proceed in the test, Chell must incinerate the Companion Cube. After doing so, GLaDOS is



surprised at how quickly Chell destroys the cube by saying that she was the quickest to destroy it than any other test subject she has seen, implying that other subjects may have grown a strong attachment to the cube during their tests.

During Chell's confrontation with GLaDOS nearing the end of the game, GLaDOS makes references to the cube and it's destruction, attempting to make Chell regret incinerating it. GLaDOS referred to it as Chell's "best friend".

After Chell defeats GLaDOS, there is a short cutscene afterwards showing more "behind-the-scenes" areas of the Aperture Science Enrichment Center that Chell doesn't explore in the game. In the last area you see in the cutscene, you see a table with the Cake on it in the middle of the room. The Companion Cube, which supposedly was destroyed earlier in the game, is seen sitting right next to the table, unharmed.

Portal 2
In one of the first rooms of Portal 2, GLaDOS fizzles it twice at the start and one at the end, saying that they ARE actually sentient and that they CAN talk, but they are so worthless that she has a warehouse full of them.

Anyways, at the ending, you can see the Cube that you have incinerated, not actually burned but only blackened.