Linarite

Linarite  is the fusion Gem between Blue and Chromite.

Appearance
Linarite is a very large fusion, having a menacious appearance. Her skin is of a pale, grayish blue color, and she has four black eyes. Her hair is styled into a large and messy white bob cut, with two tufts spiking up to symbolize devil horns. She has both Blue's gem on her chest and Chromite's gem on her navel. She also has four legs and four arms.

She wears a silver-colored top and pants of the same color, with her stomach area being left exposed, showing her gems.

Personality
Linarite is an extremely unstable fusion, to the point where she isn't even her own individual, due to Blue and Chromite being constantly fighting over full control of the fusion. She was "conceived" with malicious intents, and held together with destructive intents, and only kept existing because of Chromite's yearning for dominance over Blue, who wanted to gain control and unfuse.

When Chromite's conscience is dominant, all Linarite wishes to do is spread chaos and kill the "prisoners"; her sadism is evident at how she laughs and smiles at that thought, seemingly having fun. When Blue is in control, however, she showed great fear and regret at fusing, and attempts to unfuse.

Trivia

 * Linarite's instability was clear to the point where just by looking at her, Scythia was able to notice it; this is evidenced by her line of dialogue "We've got to do something to stop  them !", where she refers to Linarite with "they/them" pronouns instead of "she/her" ones, alluding to Blue and Chromite as separate individuals. Chromite herself was also shown to acknowledge this, as she said "(...)  We 're Linarite now!", referring to both of them together.