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"Hahh… What a mess that was." I sighed, while taking a warm shower to relax and calm down.
I already cleansed the room from my branches and leaves, leaving them inside a black trash bag. The Great Spirit told me I shouldn't throw them away, as they were "precious materials" so I just left them there for now.
And as of the Hollow incident… Yeah, it didn't left a single thing behind, the entire black body was something… ethereal, the only physical thing was its core, which the Great Spirit called "Hollow Crystal".
I was looking at it right now while taking a shower.
"Hollow Crystals are the crystallization of the residual mana and the negative emotions. It is the only part of a Hollow that's actually physical." She said. "It is also a good material and a source of filthy mana, which can be purified and reused!"
"How do you know so much about a world you don't belong to?" I sighed, wondering the most normal thing. "And were there monsters in planet Earth all this time?!"
Check "The Protagnist's Sister Is Actually the Strongest"!