I like her design (particularly the colors! I like softer purple shades) but what I'm mostly interested in is how they'll do her story. A creature that works with dreams and feeds on nightmares can be used for all kinds of cool stuff.
I think I recognize the NPC Mizu's helping in the later part of the video? It's either that girl in front of the Sacred Sakura, or the one in front of the detective agency (the one that tasked us with finding Itto in his SQ). I might check it later.