Those pencil drawings are seriously amazing, though on the first one, the contrast is low enough it took me a moment to figure out what I was looking at... It might be interesting to see what a photoshop wizard could do in the way of adding color and lighting effects...
Re: the first image, with Naija in the crystal -- it was always my impression that the blue crystals stored the spirit/consciousness of a creature, not the creature itself. The actual physical Naija went off with Mia to conquer the civilizations beyond the Veil, while her mind and memories were stored in the crystal, which Lucien discovered.