Nanase

Nanase is the younger sister to Hokuto and Kairi. Like her siblings, she is a master of the Mizugami style of fighting. Because Kairi was cursed and possessed dangerous abilities, he was to be killed by their clan. When he loses his memories, the clan decides that exile is enough.

Kairi disappears and falls under the control of Akuma, which leads Hokuto to search for her brother and either save or destroy him. However, when Hokuto succumbs to the Seal of Blood, Nanase is left to find both her missing siblings and either free them or eliminate them.