Hmm.. why was the Doctor so interested in capturing Sue?
Was it because he thought she would reveal the Doctor's plans (like previously stated)?
Sounds like a good reason. Although... even though Sue had plenty of time to reveal the Doctor's strategy to King and the others; she did not tell them until she was locked in a cage and staring at King for some time...
Did she think they knew about the Red Flowers? Or maybe she knew the Mimigas didn't know, and she wasn't supposed to tell them anything related to the War? Or maybe she didn't care about the Mimigas until she got to know them? [minus Toroko...]
Another reason the Doctor would be interested in Sue... Is she is a human... turned Mimiga. That would make her the perfect subject for his experiments. Seeing as the Red Crystal was designed to work on humans. Perhaps she was the final component he needed to figure out how to make the Red Flowers work on humans.
Or perhaps he just wanted to see if humans turned Mimiga could be used like regular Mimigas [the red flower]. And besides any mad Doctor would be overjoyed with such an unheard of specimen. (human turned Mimiga...!?)
But... there is the matter of Itoh? I guess he ran away as well? Perhaps the Doctor got what he needed from Itoh already? Or Itoh is just too good at hiding (although it seemed awfully obvious...)
Finally, maybe Sue had been sabotaging the Doctor's plans, or just plainly pissed him off xD Sue would probably smash his foot, make a face and run... GET HER!#$^&
Something to think about... why did Itoh and Sue get turned into Mimigas, and not the others?
Did Sue do something...? Also, I wonder when Itoh and Sue got transformed... Was it before Momorin got thrown off the cliff, and Booster and Kazuma were put in jail?
I wonder what were the events leading up to Cave Story...
Thinking more about it.. I wonder if the Doctor suddenly snapped? He had been drawn to the Crown and had the humans working for him. But, suddenly he decides they are of no more use?
Back 10 years ago, did something similar happen perhaps...? Robots invade the island, Miakid gets the Crown, then suddenly at one point the robots all end up dead...? Did he betray them too?
What a treacherous crown D:
Wonder if it could be related to the original curse? When the King turned on Ballos even though he had been helping his kingdom? That would be the kind of curse that would make sense for Ballos to maybe accidently pass on...
I'm just reaching probably, but it's been a while since I thought about CS xD
It could just be in their nature to begin with and nothing to do with the crown... But, still...