Mr. Maegawa was a office worker who was overtaken by the demon Eader


Mr. Maegawa was a formal Japanese man who appeared to be in his middle ages.


The man was overtaken by a green rat like demon named Eader at an unkown point in time. Shortly after Eader then slaughtered Maegawa's wife and son, the demon then continued to use the image of Mr. Maegawa  and continued to kill people, before he himself was killed by Devilman.