Maybe... [ Why some groups, and not others? As Parsee's said, though, Aerith is also considering the idea that the void may have just brought in the people that could help it, in whatever way it was needed. It's a pretty complex idea, and she can't quite guess yet at what the void needs, but...it's a start. ]

Maybe the others from Gensokyo are too powerful for it to contain more than one? [ She ventures lightly, smiling. ] So...you have to be the sole representative for now. Until it can handle more of you?