Ep. 10: Kurama's past reveals his connection to the diclonius project and Mariko's birth.
Aired on September 26, 2004

10
Kurama recounts his history as a colleague of Professor Kazukawa, joining him and his father on the diclonius project after university. During research, he contracts the virus through vectors, resulting in the birth of his daughter Mariko as a diclonius. Although he initially intends to kill her, his wife’s death and final plea lead him to spare Mariko. Kazukawa mandates that bombs be implanted in her to neutralize her if she becomes aggressive. Concurrently, with Lucy and Nana residing in Kohta’s home, the facility dispatches their most powerful asset, designated as No. 35. This episode details the tragic origins of Mariko and the escalating threat posed by the newly released diclonius.
Episodes
- Ep. 6 · Bando flees hospital seeking Lucy while Kakuzawa's body is discovered
- Ep. 7 · Nana receives new limbs and money, then meets Mayu at the cemetery before returning to Kohta's home.
- Ep. 8 · Nana reveals her naivety while Mayu uncovers Lucy's true identity and Nyu's secret.
- Ep. 9 · Lucy's past with Kohta is revealed through a music box and a day at the zoo.
- Ep. 10 · Kurama's past reveals his connection to the diclonius project and Mariko's birth.
- Ep. 11 · Mariko, the true identity of No. 35, is released to retrieve Lucy while Nana senses her lethal intent.
- Ep. 12 · Kohta confronts Lucy's past revenge while Mariko and Bando target her.
- Ep. 13 · Mariko regains her vectors and confronts Lucy, leading to a tragic final encounter with her father Kurama.