It's about time we start tagging this bastard. Is that supposed to be Nanaya Kiri next to Sion and Sougen? And who is that supposed to be between Akiha and Arihiko with the blue hair?
Got most of them, but I don't know who's the girl behind Hisui, [...]
Actually, this should be Kohaku-/Hisui's mother and not Mr. Chin. I'm pretty sure about this. Interesting is that there is only one concept art about her, as far as i know.