manipulator

noun

1. (agent, form-of)Agent noun of manipulate; one who manipulates.
2. A device which can be used to move, arrange or operate something.

   “The power lights blinked red and the amplifier failed, but not before Kassad had seen the tapering ovoid shapes, spotted with thrusters and cockpit blisters, each trailing a tangle of six jointless manipulator arms.”

3. A puppeteer, especially one controlling marionettes.