Meybe... meybe have Itch go with Hotaru to Battery City to try and maim/seriously injure Korse (or kill, whichever works) but the fab four finds out and they join in because of ribcage but she goes bezerk like she did here and friendly fire and they shock her back into reality and then they continue with the maiming/serious injuring of Korse? I unno, that'd mean somewhat of a short-ish end to this... No idea where to have it go though...
Other than that, good for fluff. Y'know... hopefully you find a plot line and then fluff could help somewhat. Like... Maybe Hotaru has something from her line of descent that kicks in around her age, kinda like bipolar disorder...? I mean, random shooting-ness sure as hell ain't normal... Eh, I unno.
Update soon! And good luck!