ASTRA

I've been using this site for about half a year, but never really talked in it. I just figured I'd say hi and thank everyone involved with this site for making it as cool as it is. I'm new to forum posting and stuff, so I'm not sure entirely how it works. If I do something wrong or out of norm, please keep that in mind and feel free to correct me. Otherwise, thanks to everyone for making this awesome place.

This is SUUUUUUPER late, but what are the characters featured in the last few stages named?