Biba Amatori

Biba Amatori is main villain of Kabaneri of the Iron Fortress is son of the Shougen who disowned and beatyed him after the war with Kabaneri caused him into vengeance against his father also people. Biba was leader of Hunters who sussposly definers for human race against Kabaneri but in reality he secretly plotting to destroyed Koutetsujou court by using civilians and Ayame Yomogawa as the bait. highly skilled yet manipulated Biba was one taught Mumei about the corpse being weak to died and Mumei believed it and followed his advance unaware his dark plans.

About
As Child, Biba's relationship with his father become stained where he scared own son for seeing become something else. Biba was 12 he was drifted to amry when people become infected with Kanbane. and his father betrayed by abandoned in cowardly way caused Biba seek revenge against the government and father.he founded the group The Hunters ( Karikatashu) which formed assistants with help of scicnest and Kabaneris while hold Kabnaari as their  experiments and Biba had seemly had romantic relationship with Hobaoi. during the time after secerly sent Kabaneri ivasion the town, Biba sees a young girl who paralyzed by the fear after a paranoid Bushi shot her mother to death and Biba save her by gave the sword then instructed to kill her mother's killer for being weak. Biba adopted Mumei as his sister then inject her to become Kabaneri and serve as henchman to him. afterwards Biba and the hunters were hailed as heroes to survivors. but some of them include Enoku who is servant become disillusioned and defected from the group and holding blood from humans by transition to Kanbane

after reunion with Mumei at Shitori Station but  Ikoma, a steamsmith who become recent Kabaneri becoming highly suspicious on Biba's motives on plan on Mumei.

Trivia
his relationship with Mumei is similar to Griffth and Casca.