Machiko

Personality
Her personality is relatively limited, in terms of the scope the viewer is able to observe. Machiko has been shown to be quite obedient and quite proud, as evidenced by her husband fearing Decim's dialogue. She is partially driven by emotion, despite having found out that she is dead. She uses her unborn child as her bargaining chip to force Takashi to reincarnate in her stead. She loves him, evidenced by her recollection of the promise that he's made to "make her happy" if she married him. It is implied that she is quite the social and sophisticated woman, containing layers that even the viewer could not peer through.

History
While it is proven that she had an affair, her true intentions towards telling her husband that the child was not his are not certain. Takashi's lack of faith in his wife resulted in both of their deaths, due to him grabbing her cell phone while driving on a cliff. They both drowned.

In the first episode, the viewer is made to think that she was lying about loving Takashi at all, and was only marrying him for money and status.

However, in the second episode we see a different side of the story. The Black-Haired Woman says that Machiko probably greatly regretted her affair, and that it could have possibly been a one-time event, which is the opposite of what the first episode leads the viewer to believe. The Black-Haired Woman also says that she believes the child Machiko was carrying was indeed Takashi's, but upon seeing Takashi break down at the loss of his child, lied to him and told him that the child was not his, to lighten his burden in his final moments if only a little.