This is a sketch by Colby Green of Gadgette Fabienne Giroux, or just "Gadget," an earth pony inventor who designed a harness with some mechanical hands to help her build things and work with tiny moving parts. I subscribe to the theory that some jobs are just better suited to unicorns in MLP, but Gadget here is out to buck the trend and break with tradition! She's shy, but very sweet, and loves mechanical things. She also has a human counterpart…

You can see her in the story "The Iron Horse: Everything's Better with Robots!" over on FiMFiction. While she is my character, Green is the guy with the artistic talent. Pay him a visit if you enjoy this style; he specializes in cute characters like this.