I've been looking at most of the profiles, and I noticed something about Dahlia/Satoko.
Satoko also may come from Higurashi no naku koro ni, a murder mystery anime/manga that quite frankly scares the crap out of me.
And Adrian looks a lot like Riza Hawkeye, from Fullmetal alchemist, no?
I guess you can post other possible namesakes, or just talk.
Hey, anyone going to the Collosal Con in Cleveland, ohio this summer? It's in June.

I don't think the creators were thinking of Higurashi at all because it would be such an obscure and random reference. There are already topics floating around devoted to characters that look like other characters. Also, questions about conventions are usually for the cosplay section.