Cobalt

Cobalt is an engineer specializing in steam powered contraptions. He has a part time gig maintaining the pneumatic tubes in Goldmortar Library. This job is mostly a precedent for him to access rare engineering books for his own contraptions.

Though seemingly well intentioned at first, Cobalt's inventions have a strange tendency to become weapons. Prosthetic hands become battle augments with retractable saw blades; pocket lighters become portable flamethrowers. He insists these changes are the result of the natural creative process, and not a symptom of hidden homicidal rage.

Cobalt is solitary and somewhat arrogant. Engineering is his sole obsession, and he frequently foregoes friendships and relationships in favor of tinkering late into the night. He's perpetually smeared in grease and doesn't own a single unstained shirt. Many dragons report feeling mildly creeped out by him.

The end of his tail was amputated and replaced with a steam one. It possesses a light-based laser at the end that can cut through small objects; he curls it over his shoulder like a scorpion's stinger when working.