After

I think i read it somewhere that after she died the spirits have gone wild because....

Then?

What happened?

Spoiler..
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As the title states, Keira was indeed the real one and Cosette was fake and a devil(not sure coz i already forgot what I'ved read) but yeah that's the story of it.
╮(￣▽￣)╭

Spoilersss





So from what I know basically after she dies the spirits go wild and when the empire falls into danger and cosette can't do anything cuz she was just pretending that kieras powers were hers the empire basically goes into ruin and then her father and the wizard dude turn back time