"Oh! Sure!", Catherine replies to you, pulling out her phone and quickly giving you her number. She even gives you some other info as well, such as her own address. Your not really sure why, but you won't complain. And hey! Turns out she lives in the same dorm as you! Just on a floor a couple down from yours apparently. Thats sort of convenient. And given the fact that she's shown herself, at least so far, to be pretty mentally resilient, she could be quite useful in your efforts to get information. You could send her into dens of shadow demon corruption incognito since you could rely on Throne magic to keep her safe. For now anyway. When you ask about her staying the night with you though she practically leaps at you, wrapping you up in a hug that sees your face shoved between her towel covered tits. "Oh yes please! I just want to hang out with you though. Your so cool! This is so cool!", she gushes as she smothers you for a moment. In this moment you are suddenly clued in that Catherine is significantly taller then you. Like, by nearly a foot!
That settled you then go about calling miss Stone. The phone rings a couple times, but you get an answer quickly enough. "Oh hello Jenny! How goes things in Hailtown?", she asks in a mature naturally sultry voice. You explain the situation and she listens patiently till you explain everything you've learned and done till now. "My my! I know towns without any magical girls around can be bad but I think this might be the worst I've ever heard of!", she says, genuinely surprised by the apparent scale of shadow demon presence. "Still, you've performed remarkably well for your first day, and kept your cover even from large dens. Thats good. If a large den finds out your true identity and where you are in a large infestation like that they could be bold enough to attack you directly! Good job on luring away small groups and purifying them and getting some Thrones born. It's a fantastic start.", she says, her words filling you with pride. "As far as a center though. I'm willing to bet there is no... true coherent leadership between those large centers of corruption. One is bound to be the most powerful though, so if they is any cooperation between them that one is likely in charge. I'd recommend visiting all these places to try and get a clue, but that might involve actively letting shadow demons fuck you and knock you up while not converting to keep your cover. Alternatively though you can try to find a succubus or omnibus leader and try to fuck the answers out of them. You could try it with the grunt demons too, but most of them aren't too bright, as you've probably seen already.
"While you do that though I'll call some fellow magical girl's and see if we can't free up some time to support you. Around ten of us should be plenty enough of a match to wipe out a den of shadow demon's, though if you could make some more thrones before hand that would certainly help. It seems you've made a couple friends too. If they're willing they can help you do that.", Miss Stone explains.
Spoiler (click to show/hide):
So as I write this I basically got an idea for a pretty simple, and hopefully fun, kind of... fortress system. Shadow Demons dens could be considered fortresses lets say, and in order to make fighting a whole den at once in a big sexy battle scene, getting some thrones before hand would make it easier as like, +1 modifier lets say on a D100. Maybe with scaling difficulty between fortresses. Sounds fun to you?