Black's "inner demon" who appears before him after he loses White and becomes unstable.

Black and White are two orphans who roam the streets of Treasure Town, beating down any thug or yakuza who gets in their way. When mysterious foreign entrepreneurs appear with the intention of tearing down Treasure Town and replacing it with an amusement park, Black and White face their greatest adversaries yet. It is up to the destructive Black to save the fate of the city and up to the gentle White to save Black from his own dark nature. 

Orphaned on the mean streets of Treasure Town, lost boys Black and White must mug, steal and fight to survive. Around them moves a world of corruption and loneliness, small-time crooks and neurotic police officers, and a band of sadistic yakuza who have plans for their once-fair city. Can they rise above their environment?
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Won the Best U.S. Edition of International Material - Japan for the Eisner Award in 2008.
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(Source: Viz Media)

The Minotaur