I like this idea of reviving the forum using RP. I haven't roleplayed much (aside from homebrew tabletop RPGs) so I don't have much experience, BUT that doesn't mean I wouldn't be glad to be a part of a new RP in here!
So, does it have to be a Magical Girl RP? I do have ideas, however, do you have any? Seems more fitting that a veteran user proposes before a newbie like me...