Dosu-Roku was Akira Fudo's former bully turned freind from Devilman. He showed up a whole bunch of times throughout the manga, at first being a potential rapist towards Miki Makimura, he tone later softend till he was best of buds with Akira. He shows up in a few Neo Devilman stories and in AMON he becomes a devilman for a short while before being killed. In Grimoire he is killed by Aleda. He shows up in the birth, vs cyborg 009 and vs Hades as well.