Mildred Ice Cube lives in Hailfire Peaks (Ice Side) right beside Boggy's Igloo with her husband George Ice Cube, when Banjo and Kazooie speak to her she tells them that she has misplaced her husband. A huge blizzard apparently whisked George up to the Sky, she wants Banjo and Kazooie to go and find George for her. Instead however Kazooie fires a Grenade Egg at her causing her to explode into a million pieces, this results in you being able to aquire the Jinjo that she had inside of her. Before she died she asked you to let George know his dinner is in the...sadly she perishs before she can tell you where.
Banjo-Kazooie: Nuts and Bolts
Mildred then later appears in Banjo-Kazooie: Nuts and Bolts in Banjo-Land in the "Freezeezy Peak" display, you help rescue her husband who has fallen into the "Gobi's Valley" display. It's never cleared up whether the Mildred that appears in Banjo-Kazooie: Nuts and Bolts is the same Mildred from Banjo-Tooie that the Lord of Games has revieved or whether they are just replica's of them, she never brings up the fact that you killed her though.
* Mildred and her husband George are most likely based of a hit British sitcom called George and Mildred.
* Mildred is the only friendly character Banjo and Kazooie have to kill for there own personal gain.