Eva (エヴァ Eva?) is the main antagonist of THE OneeChanbara 2 and its update title THE OnēChampon / Zombie Hunters 2. She is the instigator of the second zombie incident, having unleashed zombies in Japan with the intention of breaking the seal on Saki's Baneful blood.

Eva returns in OneeChanbara ORIGIN as the main villain once again but is also given a deeper backstory. This incarnation of Eva is voiced by Yūko Kaida, the original voice actress of Aya.

Eva is an attractive and voluptuous woman with green hair wrapped in a long ponytail. When Eva enters Blood Rampage, her hair turns silver.

As a weaker member of the Baneful Bloodline, Eva was mocked and looked down upon by the rest, leading to her despising them all. She bore a child to a man she didn't choose, awakening both her hatred and her power. In a fit of jealous rage, Eva killed Oboro's beloved wife Tsubaki. Although she gained tremendous power from devouring Tsubaki's heart, she also contracted an incurable disease that would end her life soon. Not wanting to die before properly raising her daughter, Eva sought to increase her power by devouring the hearts of other Baneful members.[1]