Blood is thicker than water.

Steel wasn't the only child of the Cog family effected by the sabotage and destruction of the family's Canterlot factory. Being protective of his family, Cobalt took care of his younger sister during her stay in the Canterlot emergency care unit going so far as to use the family fortune to hire the best surgeons available to improve her odds. While he is not skilled in engineering like most of the Cogs, he did inherit his late father's business sense. Whilst Steel herself possesses considerable wealth, Cobalt's is tenfold. Mentally he is more stable than his sister, and can be found in Manehatten high society. He however is not to be crossed as he possesses less compassion than his insane sibling, the effects of losing most of his family in the same explosion are unclear. Steel Cog is the leader of the Cobalt legion, Cobalt Cog is the financial backer.