You were locked up in Grunty's many worlds. You didn't want to work for her but ended up trapped by the ugly witch.

A bear and bird telports into the world you're in. You've heard their names from Grunty: Banjo and Kazooie. Banjo wasn't a very bright bear, while Kazooie was a sassy sarcastic female breegull. They wanted to free Banjo's sister from Grunty.

Kazooie: "What's this lousy thing?"

Banjo: "Kazooie! Don't say that!"