Spinel

Spinel is the main antagonist of Shamus and Puppets series and Golden Shamus and the Microphone Machine.

She is Pink Diamond's former best friend of the Homeworld Gems, After realizing Pink was not going to come back to her and after hearing about Steven Universe, she sought to destroy all life on Earth as a twisted act of vengeance. She is Shamus, Shadrina and Golden Shamus' arch-nemesis.