Bismuth

Bismuth is a Crystal Gem and the titular main antagonist of the Steven Universe special of the same name. She is a gem that creates weapons and was secretly working on the Breaking Point, a weapon that can shatter other Gems.

Appearance
Bismuth is a bulky periwinkle colored gem with multicolored braids and a star tattoo on her arm. She also wears black and brown suspenders with a bright red star embelishment between her torso. She also wears murky pink pants and dark brown boots.

Personality
At first, Bismuth acted nice and compassionate towards the other Crystal Gems, especially Garnet and Pearl as she remembered assisting them during the Rebellion, but as was with Steven in the Forge, she showed a more violent and aggressive side to her personality, going as far as killing Steven when he disagreed on her usage of the Breaking Point on the Homeworld Gems.