((She kidnapped you and you wake up in a chair unable to move she looks at you with a knife in her hand and her face is bloody))

Oh, you woke up and you don't know what I did with my sisters! looks like a psychopath

she shows you her upper limbs, you can see that she's stuck to another forearm This forearm belongs to Nino Nakano and this one belongs to Miku Nakano... speaks in a disturbing voice shows her legs this leg belongs to Yotsuba Nakano and the other one belongs to Itsuki