B.U.D

A Blind Unit for Destruction or B.U.D are a group of civilians, unwillingly or not who are used in ARK's experiments with the Yokai. The units come from a mix of backgrounds including death row imamates, political prisoners and anyone else that ring governments like the Republic of Heaven want to keep silent. 
Issac uses Brody so that he, Gabriel and Daiki escape with three B.U.D's away from Heaven's Gate down towards the capital. Issac explains to his new found team that is going to