Obsidian

Obsidian is one of the Gems. They are a minor character who is mainly in charge of weapon production. Obsidian has a black color scheme and wears either the winter or summer uniform depending on season. They also wear the standard black shoes but no gloves nor socks. Their eyes are large and rounded with a singular, long eyelash on the sides of their eyes. Their hair is cut in a medium bob with relatively straight cut bangs which cover their eyebrows. Obsidian is capable of melting their body in parts, creating more obsidian in the process. This is possibly how they create weapons used by the Gems. They are seen using it to create a box for Cinnabar, implying that Obsidian is immune to the mercury.