In Honkai, Deceiving the Whole World!

[Completed] The world had been perfectly fine, but suddenly it had become hard to make sense of. Cecilia, who should have died, was not only alive and well, but had also appeared in a new version, claiming to be the "ultimate weapon of humanity." Kallen, the saint from five hundred years ago, had returned to the world and begun acting on her own authority. She was the "Witch of Salvation." Cang Xuan and Dan Zhu, who claimed to have ruled the world for five thousand years. Or perhaps the strange Elysia. The strange Vill-V, the strange Mobius, and all sorts of other strange girls... What was going on?! The gods of Liyue, Inazuma, and Sumeru... Faces that seemed familiar, yet not quite. Beings that seemed familiar, yet not quite! "It's an IF timeline! It has to be an IF timeline!" said Welt. "It must be a parallel universe!" said Kevin. "Kallen, my Kallen..." said Otto. "..." Schicksal, Anti-Entropy, World Serpent. Even the whole world! They cried out in unison! Miss Ainis just smiled and said, "Oh, sure, sure! That's right, that's right, you've found me out! So then... whose doll should I become next?" (smiles)