Gunslinger Girl, Vol. 3

It's manga's answer to The Professional! When the Social Welfare Agency starts looking into one of their missing agents, their investigation leads to a rival agency, the Republica Federale Padana. Triela will infiltrate Padana, but a bloody battle will leave her staring down the barrel of a gun! A more personal battle will rage inside of Henrietta, as the final fragments of her humanity break the surface of her mostly mechanical body.