Tenchi's mother, he has very few (if any) memories of her (she died when he was very young). Most of Tenchi's maternal memories come from his grandmother.

Tenchi's mother died when he was very young, but he can still remember her. He's very fond of her and is seen showing a movie of her to the girls. Achika also has an unbelievable Jurai power which towers over Yosho's and even Tenchi's himself. It was the use of this power that cut her life short.