Zero: Black Blood - Season 1 Episode 3 Enemy

Satoshi meets Koichi Nakaima who gives him a tour of the community, learning that Ring's beloved Iyu is a human who possesses a singing voice that instills calmness in the humans. After the tour, after giving Satoshi a card so he can call Natsumi, Nakaima is summoned by Ring to know that the number of Blood Dolces must be increased by two in relation to the Horror population. After Satoshi makes the call, Natsumi tells Rei's group of his location. However, the group learns that Ring has moved the community as the Horror attempts to have Rei understand his way of thinking. Upon seeing Rei's group is beyond reasoning, Ring prepares to kill them when Iyu appears and is revealed to be Yuna's mother before she is spirited off by Ring. Meanwhile, after being sent to Club Lupo to wait for the group's return, Natsumi has a visit from Nakaima.