[Used Can]

Originally Posted by Sammich

Spoiler for Spoilers as usual:

What? But then that means she really did kill Jessica? And the rest survives? o.0

Spoiler:

Natsuhi being the killer was Erika's deduction. However, she reached that conclusion entirely basing it on logical facts and red text, no magic.

In addition to that, we see Beato's ghost alongside Natsuhi when she committed those murders (much like when Eva-Beatrice was alongside Kasumi).