Miharu Akiba

Miharu Akiba was a human who plotted with the rest of her family to kill her father-in-law to inherit his fortune. She was the wife of Shuji, daughter-in-law of Shuzo, and the mother of Koichi and Asami. Unlike the rest of her family, who wore casual Western clothing, she was always seen wearing a formal blue kimono.

History
Miharu inherited the rights to her husband's company after his death, but the company stagnated and went belly up. In desperate need of money, she and her son created the plot to kill Shuzo and talked Asami into helping them.

A Soul Lost in Darkness
After successfully scaring her father-in-law to death with Koichi's stage lighting, she and her family began the drive home. After Koichi stated he was hungry, she agreed and told Asami to pull over so they could have a celebratory dinner.