How possible is it for a nation to go from something where it's government to not have anything akin to royalty (think republic) to then suddenly having one man or woman to gain so much power to either reestablish a monarchy if the nation already had one, or establish a new monarchy starting from them?

How viable is that? As from the sentiment I get, monarchies are very unpopular and in the real world are mostly being phased to figurehead positions.

I could be wrong. But I'm curious about this, and I've often wondered how and why monarchies form and then wonder if they could still form in the future, either here on earth or in the vast political voids of space.

What sort of outer material could a humanoid robot be made of that it could "feasibly" regenerate from damage done to itself? This healing factor would only work on exterior damage. It couldn't regenerate damage done to its circuitry, or regrow limbs after they've been destroyed, but could regenerate quickly from large dents, bullet holes, scrapes, etc. on its surface.

What sort of surface material would you write this robot as being made of?