Sunako's reaction was exactly what I was hoping for. Her calm leadership cracked (ever so slightly) when Chizuru died. For once, she ordered them to kill (not to feed), though both actions ultimately are for their survival anyway.

Her vampirism being ther most developed leading to her forced sleep during daylight hours was a bit inconsistent. I remember her looking out the window that time when the entire village rocked up to the Kirishhiki's house and Ozaki checked the main guy's pulse.