After you figure out the eyes, I think you should work on making the functional robot hands retract at the wrist, and have claw-like hands emerge in their place, hypothetically speaking. The claws will need to be able to clink menacingly and repeatedly. You’ll want to test several different types of metal to get the clinking sound just right—more of a hammer on steel sound, less like wind chimes.
After you figure out the eyes, I think you should work on making the functional robot hands retract at the wrist, and have claw-like hands emerge in their place, hypothetically speaking. The claws will need to be able to clink menacingly and repeatedly. You’ll want to test several different types of metal to get the clinking sound just right—more of a hammer on steel sound, less like wind chimes.