INITIAL seems like a pretty good place to start. But where do we go from here?
(The mean version of this puzzle doesn't tell you the order of the steps.)
Answer Checker:
Hints: The scantily-clad invader girl is Lum from Urusei Yatsura. I tried to use clues for "initials" wherever I could, to be thematic, but there's only so much I could do. There are some non-initial abbreviations and some non-abbreviation clues. I'm supposed to make this whole puzzle in one day! The word you should get after the first step is ILLUMINATI.