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Aside from the Vampire souls getting into their new ghost appearances and being given to Rose to do whatever she wanted with them, alongside the new factory of negative energy made of the tortured souls of the Dark Shadow Sect Members I caught and left inside of Rose's Phantasmal Stomach (which is a new ability of hers by the way), there were other things that happened last night after the entire incident.
Although I thought about completely cleaning the entire territory where the Dark Shadow Sect ruins remained, I preferred to leave them be, as Mikohime told me that it would be better to leave them like this so we could use this place as proof that we defeated the Dark Shadow Sect to the Righteous Sects or Nations that might come check here after the entire commotion.
Check "The Protagnist's Sister Is Actually the Strongest"!