|First Appearance||Neo Devilman|
Yasuko was a Japanese woman with black hair and looked to be in her 40's.
She is seen with her daughter Mina and husband sitting at the table watching the television when a news report comes on, Masaru comes down but she tells him to be quiet and to watch the report. An interview comes on a has Ryo Asuka show a video tape he took of Akira Fudo's first transformation into Devilman. When Masaru starts to laugh paranoia gets the better of her and she starts to suspect him of being a demon, this pisses him off and he leaves to go see his friend Takeshi.