Ooccoo's a demented-headed chicken thing that helps guide you through dungeon guide.
Truth of the matter is that Link should've left this monstrosity in that godforsaken pot back at the Forest Temple. At least she's chillin at the Ooccoo shop now after finally hunting down the Dominion Rod. Oh and lest we forget the other equally bizarre part about Ooccoo: her name's spelled in the same color as Link's tunic from the first Zelda game. Potential hat tip?