The Red Oni
Small but Experienced Infantry section that has been on sub-contract with Red Oni from the start.
The history of the grave diggers is something that is not spoken of. There is clearlly a bond between them and Hayato Yasuki, the so called Red Oni. As for what it is none will say perhaps it has something to do with the period of time between Yasuki leaving the service of the dragon and becoming a Merc.