Darquesse's Decision

What happens after Darquesse leaves Skulduggery and China? Is Valkyrie really gone? If not, what remains of her personality? What control does she have over herself? Will she destroy the world? The time may come when she needs to make a decision. But which one will do it, and what will it be? Who will influence her? (fletcherie, follows canon until the end of LSoDM)