Sachiko Yagami

From Death Note Wiki

Light's mother
Debut	Manga Chapter 1, Anime Episode 1
Birthday	October 10, 1962 (1965 in anime)
Deathdate	N/A
Also known as	Mrs. Yagami
Sign	Libra
Age	41-42 pre-timeskip, 47 post-timeskip
Status at debut	Light's mother
Relations	Soichiro Yagami (husband), Light Yagami (son), Sayu Yagami (daughter)
Seiyū	Ai Satō
Voice actor	Saffron Henderson
Knowledge	6/10
Conceptualization Power	4/10
Will to act	3/10
Motivation	3/10
Social Skills	6/10

Sachiko Yagami (夜神 幸子 Yagami Sachiko) is Light Yagami's mother and Soichiro Yagami's wife. She is oblivious to Light's ownership and use of the Death Note. Ai Satō voices her in the Japanese anime and Saffron Henderson voices her in the English dub. In the films, Michiko Godai portrays her.

Obata said that he had no real concept behind the design of Sachiko; he said that he encountered difficulty in drawing female characters who were not the main characters.

Ohba did not include Sachiko in the final chapter of the manga. He said the outcome would likely be that someone "like Aizawa" would tell her that Light and Soichiro died in order to stop Kira. The Task Force members would never let the world know the truth about the Death Note case.