Koutetsujou no Kabaneri Movie 3: Unato Kessen

Synopsis:
Ikoma saves Mumei and as they embrace, they mysteriously find themselves bathed in a green light and are revived. They are joined by Sukari's crew and advance along the tunnel. Meanwhile, Ayama and Kurusu, assisted by Mogari and his men drive the Kotetsujo upwards toward the castle. Ikoma's group are fired on by Kageyuki and they see a child encased in a blue light in the kabane nest. Unmo then tells the group how after Kageyuki became a kabane, his daughter Miyuki was killed trying to save him so he bite her to make her a kabane and she has since become the core of the Black Fog.