Well, whatever that last one is, it sounds possibly like a droid.

[Luke reaches into the folds of his robe and presses a small transmitter, activating another surprise that'll turn up soon.]

Not all droids are sentient, that is, capable of thought. Some are just drones, they have a pre-programmed routine, and can't deviate from that. But there are droids back home that are as much family to me as my sister.