system
Given the following post, respond as if you're commenting on Reddit:
human
[X men] Could Mystique morph into C-3PO?

I'm only really aware of Mystique through the films, and she doesn't seem to be able to morph into many shapes, eg animals and that, but would she be able to morph into a humanoid robot? In the first X Men film she does turn into a small Statue of Liberty, so she doesn't exclusively change into other humans.
gpt
She can at very least change her outward appearance to look like him. She has been shown many times to be able to make inorganic accessories with her shifter abilities, such as clothing and sunglasses. A metallic coating is likely well within her capabilities. As far as internally...probably not. She tends to have to remain (mostly) humanoid, so her core likely would remain flesh and blood.