I think Rhue will kill himself at the end to save everyone, depending on your kills, and relationship with all the other girls. At the end we are left with the question .. did she really exist? did he kill her? ect that would be cool. This is what I thought all the switches in e6 would be about, and would contribute to your end in later episdoes. Different paths, maybe there are two endings, one where Rhue goes mad and still is the phantom slasher, still terrorising the way. And then he can kill himself, and save everyone. It would really show if you could "control power"
of course he doesn't have to be the slasher. Maybe as a final twist when Rhue dies/kills himself, Gaius goes..
"....." then gets a really evil grin on his face and takes Rhue's sword. That would be freaky. There are just so many possibilities
I think the final meaning might be all about justice, and who can really say what is right. Maybe Rhue can only kill himself by his blade, and that is why whe his blade goes missing it seems to have 'protected itself' and Rhue is so obsessed with his sword.. Maybe Gaiuses sword is the ultimate Illuminati, and that's why Rhue couldn't hit him. Maybe Gaius and Rhue can both only cause their ends by their own swords..