Cephalos.
Real name: Kalani Kani. He was born somewhere in Hawaii almost half a century ago; other than that, like most villains, his background was in the dark, especially since he was in a time where communication and information were limited. He was, however, famous for massacring entire villages as soon as his powers woke up…
…and one other thing.
Technology then wasn't as advanced as it is in present times; without powerful satellites to observe and analyze activity on the ground, the response time of the supers wasn't as fast.
There was a reason why Mega Woman was placed on a pedestal amongst the other heroes that were emerging for the last 300 years-- and that was her ability to never seem to get tired.
Of course, Mega Woman still needed to sleep; but one would always find her flying through the skies 24 hours a day, sometimes for a whole week without rest.