Anime: DragonBall, DragonBall Z, DragonBall GT
Manga: DragonBall, DragonBall Z
Chi-Chi is Goku's wife and a fairly strong fighter herself. For a human, anyway.
Chi-Chi is a mother of two, Gohan and Goten. She was way too over protective of Gohan when he was young but trained Goten in fighting when he was little. She may not have a high power level, but even Goku is afraid of her when she's angry.