Triela

She was former victim of a Mafia child smuggling group based in Amsterdam, Triela was one among many who regularly suffered abuse in the form of drugs, torture, rape and mutilation. She was rescued by a pair of Europol detectives, one of whom was her future handler, Hilshire. After being mortally wounded in a gunfight, Hilshire's partner bravely used the last of her strength to perform CPR on Triela, enabling Hilshire to save the child's life. Triela has a sarcastic wit and prefers to wear masculine clothing. She serves as a sort of mentor/Mother to the other girls of the SWA and she retains the most realistic outlook on their situation. Triela's preferred weapons are the SIG-Sauer P230 SL pistol (after losing her P230 to Pinocchio, she is given a 232-SL as a replacement) and the M1897 Trench Shotgun with bayonet attachment. She has also been shown using a selection of Heckler & Koch weaponry, including the H&K G3A3 battle rifle, the H&K P7M8 pistol, H&K UMP submachine gun and H&K MP7 PDW. (source: Gunslinger Girl Wiki)