Yoshiko (美子), is a character in Tsuyoshi Shikkari Shinasai Taisen Puzzle Dama.
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Yoshiko is from the family Ikawa, and the mother of Tsuyoshi, Keiko and Noriko. Yoshiko always have a soft point for her two daughters, which she never refuse them anything. But it is not the case with Tsuyoshi, which she let him do all the housework.