Well, Noriko.

If I saw someone violently coup a representative democracy.

Activate a superweapon that locked out all foreign threats and interference.

Shift the balance of power to them and their family at the cost of said representative democracy.

Install members of said family in key positions of power outside the royal family.

And then tell everyone I plan to ensure peace and prosperity for a new era of mankind.

I'd think they were an egotistical supervillain!