Cover of the twelfth volume of the Japanese release of the Gunslinger Girl manga series
The past of Enrica and Sophia continues including Jose's peacekeeping duty in the Balkans before being sent home, Jean's engagement to Sophia and Enrica accepting Sophia as her future sister-in-law. How Dante was involved in the bombing that killed Enrica, Sophia and the Croce brothers parents is also revealed which what lead the brothers joining the SWA. Back in the present, the repercussions of Dante's attack on Venice has an effect on both sides. Henrietta's deteriorating condition requires a dangerous treatment which a cold hearted Jose approves and Dante visits a crippled Cristiano, who wants revenge against the SWA for the deaths of Franco, Franca and Pinocchio.
- Chapter 67: "A New Family" (新しい家族, "Atarashii Kazoku"?)
- Chapter 68: "The Croce Affair" (クローチェ事件, "Kurōche Jiken"?) (Part 1)
- Chapter 69: "The Croce Affair" (クローチェ事件, "Kurōche Jiken"?) (Part 2)
- Chapter 70: "The Croce Affair" (クローチェ事件, "Kurōche Jiken"?) (Part 3)
- Chapter 71: "The Croce Affair" (クローチェ事件, "Kurōche Jiken"?) (Part 4)
- Chapter 72: "Fantasma (Part 2)"
- Chapter 73: "Addio"