[ This case is a clusterfuck and Miach doesn't particularly care about Nanami or who killed her, but she's went and picked glass shards out of gore for this, so might as well see it through. ]

The events of Thursday night, as told by the witnesses slash suspects go as follows: Seraphina called Nanami over to the dollhouse to confirm whether or not a specific doll is related to her hostage. Zack saw Nanami walking in and based on the hair color, mistook her for Szayelaporro, whom he believes to be Eliza's killer. He attacked her from behind with the scythe and in the rush of the moment also attacked Seraphina. In the process of this, several dolls got slashed, which can be confirmed by anyone who has been at the crime scene. After thinking the deed done, Zack left the dollhouse.

Then someone else entered and healed Nanami and Seraphina. The only object known to us that has this healing ability is Tamamo's mirror. This very same mirror was then used to bash Nanami's head in, killing her. Seraphina insists it was Tamamo. Tamamo meanwhile claims to have lost the mirror on Wednesday.

What is left for us to determine now is whether or not Zack and Seraphina are both saying the truth and if so, who used the mirror - both to heal and to kill.

Does anybody have something to add to this?