Meet Tinker, the Classical Equestria scientist/machinist who transferred her consciousness to an animatronic, and "lives" on to this day as Princess Twilight's lead researcher. She has an acerbic personality and an ego that rivals Rainbow Dash's, but who knows how much she's changed over two thousand moons. She is Equestria's leading roboticist, and responsible for creating... some infamous things, far beyond the possibilities of modern technology. She is also constantly looking to upgrade and maintain her own body, as even immortality requires maintenance.

I have a lot on my plate at the moment, but this is a character I intend to write a short story about at some point, probably as part of my planned anthology.
lol, I didn't even think about her race. Guess she's staying an earth pony. I wouldn't necessarily call her a robot either, as she's more like a... possessed ball-jointed doll, or half-way between them, I guess.
Oh, this is also the first art drawn on my new Cintiq, so that's fun.