Окой

This curvy, provocative, presumably - harmless girl is more than what meets the eye. ready for action, Okoi is always up for anything...from bear hunting to taking the Iga head - on by herself. But, her dangerous bravery may be her Achilles heel. After she's captured by the Kouga's cardinal enemy, trapped in a storehouse and waiting questioning, Okoi uses her looks to her advantage. When her enemy Rousai draws near, desperately wanting to take advantage of her voluptuous curves, Okoi sucks the blood from his pores during the moment of contact. And when she's through sucking the life out of Rousai, she vomits repeatedly, as if she were cleasing her soul. (Source: FUNimation's Official Basilisk Website)