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John was the pet dog of Ryo Asuka and Professor Asuka. He made a brief appearance in the animated film 'Devilman: The Birth'.


John was a dog of unknown breed. He had a wide, medium-length snout; loose skin around his mouth; and large eyes. The fur on his head was light brown in color, except for his black-tipped ears and a white patch at the end of his muzzle. His ears were slightly floppy.

Overall, John's face shape is reminiscent of breeds like the rottweiler or pit bull.


John was the pet dog of Ryo Asuka and his father Professor Asuka. However, after Professor Asuka discovers the Demon Mask and is possessed, he kills the dog by cutting off its head and impaling it on a broken stick of bamboo.