Robots can be fine choices for PCs in games. But you need to be aware that they have their own package of advantages and, importantly, disadvantages that humans or other living creatures don't have. They don't need to eat or sleep or breathe, but equally, they require a power source and can potentially be switched off or affected by electromagnetic radiation that wouldn't bother living beings. And water can present a very serious problem - especially salt water.

So don't be surprised if your robot character suddenly needs to take a long sea voyage on a leaky wooden ship for some reason.

Transcript

Chewbacca: I shall go see if I can get the hyperdrive online.
Leia: I thought you fixed it.
Chewbacca: It takes an hour to warm up. And that hour hasn't started yet.
Leia: So why didn't you start it an hour ago?
Chewbacca: They would have been able to track our ion signature. Now it'll be disguised by the star destroyer's.
Chewbacca: Someone has to get us out of this mess. {leaves cockpit}
C-3PO: I agree with Chewbacca! You couldn't have put us in a worse position if you wanted to get us captured by the Empire.
Han: What are you saying?
C-3PO: You know, I think you're—
[SFX]: klik
C-3PO: What are you doing?
Leia: I switched you off.
C-3PO: You can't do that!
Leia: You're a droid. You have an off switch.
Han: Cool. Switch her to "blend"!