Black Wolf was a first known leader of the Imperial Pack, consisting of black wolves. He was Gaia's ancestor and Gaō's enemy.

Ginga Nagareboshi Gin

Around 100 years ago, Black Wolf's pack in Hokkaido had fights with Gaō's pack about territory and prey. When humans came and threatened his pack, he went to Gaō's Underworld kingdom to ask for help. Despite their earlier enmity, Gaō let them in since he understood how bad situation they were in and felt sorry for them.

However, Black Wolf was evil and his kin plotted to take over the Underworld for generations. Purple Wolf, his ninth-generation descendant, succeeded in this.

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