Maybe you can make an enemy based off of Yuki-Onna from japanese mythhology . The spirit of a woman who froze to death . She is said to use her icy breath to kill people . Long black hair, white skin blue lips and a white kimono . I know your going into the animal/ tribe theme but just giving more ideas aswell. Not only that some kind off asian looking monkeys or baboons that are rabbid or corrupted could fit too?