Dust of Osiris

Dust of Osiris is the potential future version of Sion Eltnam Atlasia created from the remnants of Tatari, and a villainess from Tsukihime. She is the thirteenth of the twenty-seven Dead Apostle Ancestors after succeeding Night of Wallachia. She is voiced by Natsuki Rio.

Background
Dust of Osiris is a version of Sion created from remnants of her soul by Wallachia after drinking three liters of her blood. These pieces of her soul developed correctly within Tatari over time and fought to seize Tatari's control system. It would have regularly been an impossible struggle, but she became the next generation Tatari after Wallachia was destroyed. She is a future representing the way things would have been if Sion had stayed with Atlas and eventually reached the position of chief of Atlas. She worked on creating the Philosopher's Stone to cure vampirism and revive Riesbyfe Stridberg, and also kept acting as an Eltnam while working on the prediction of the future for the purpose of protecting humanity from unavoidable destruction and the acquisition of a method of salvation from it. Having found no conclusion much like Zepia a millenium beforehand, she was eventually appointed as Tatari and one of the twenty-seven and sought to protect the future by destroying it herself and keeping an eternal record. She is brought forth one year after Night of Wallachia was destroyed by Arcueid Brunestud and Shiki Tohno, using her abilities to recreate events of the previous year, "Hologram Summer," once again in an attempt to form an even superior "Night of Wallachia." Her goal is to reach the future summoned by Arcueid to defeat Wallachia, out of belief that this is the "final and ultimate method of salvation" due to the fact that the self-destruction of humanity is unavoidable.