Anyway, we're straying off the points. Let's leave all that aside. Past drama stay past drama. Let's focus on the ownership to our characters.
Character names? Ours. 100%
Personality? Ours. 100%
Appearance description? Ours. 100%
Background story, excluding the mentions of the Pretty Pretty Tower and Francesca Turner? Ours. So I'd say 95% is ours?
Powers? We came up with them. Ours. 100% (For example, would you have known that Cleo would have explosive powers? No, because I came up with it. So it is my idea.)
Mutation? Let's give that to you, although we came up with what the mutations will be. 50% then?
That's 92%. You can have the rest 8% of our characters. Do whatever you like with their left ventricles. Note that this calculation, as you asked for, is done without the argument that you created the roleplay so our characters are your property, because we all know that doesn't make sense. As we all understand.
Anything 100% should not be included in your Elimination Methods as we have whole rights over them. That includes any parts of the background stories that are not Francesca and Pretty Pretty Tower related.
Let's end up with a negotiation. You can include how you punish "Gen 1 girls" as general Elimination methods of what could happen to them. Erase our OCs names and details, just keep it as elimination methods. Since the elimination method is based on our powers, I believe that made up the rest 8% you could own. I guess we can give you that? I think this is pretty fair.