Board Thread:General Discussion/@comment-6192846-20150326001739/@comment-6192846-20150405010435

Nemesissa wrote:

And they're all gathered within the mind of Levia...? And somehow Seth is the one who caused that...? What, did he alter Elluka's body at some point? It's explained rather clearly in the previous scenes. Seth's Black Box Type S was installed in the heart (whatever that is) of Irina's stuffed cat body. She used it as a last resort and everyone caught in the blast was transported into this inner world, the embodiment of Levia's subconscious.

That includes Elluka Clockworker (Levia, Behemo, and Eve), Gumillia, and Irina. So everyone's there.