I can't be certain yet but I think if you destroy the guy you get the forbbiden armor later, and if you forgive him you get the mystic, again can't be sure yet.
I'm not saying I dislike this game, it's really good, but the story differs somewhat, you should try to keep them similar, and why does it say your a sweeper knight? I was a noble it #2 now I'm a mage, which kicks @$$.
All of the sudden it was Lethal AND I who destroyed the fleet ship? I killed that myself lethal was sealed up, I killed the demon at the end and destroyed the ship and got a high rank in the RTF, buy I guess you have to tie something up for those who didn't play 2.