In the latest episode of Steven Universe “It Could Have Been Great”, the gems went to the moon to retrieve some coordinates for the drill. They come across an old computer terminal that is locked.

The system-on pad has the four diamonds on it. The only way to access this computer is if you have the identity of one of the diamonds.

Who turned on the console?

Steven did. And just like a computer, once it’s unlocked and on, anyone like Peridot can use it. This means that Rose was indeed Pink Diamond and that means Steven is also a form of Pink Diamond.