Who is Kiera Salter/Marie Skibbow from The Neutronium Alchemist Conflict and what is their importance?

Kiera Salter is the soul possessing Marie Skibbow's body. She is the leader of the possessed society in Valisk. She also created the Deadnight recording in order to lure young people to the habitat to be possessed. Kiera is described as extremely attractive and willing to use her looks to gain her own ends.