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In the manga, Yōken is an anthropomorphic water buffalo, with dark fur and horns, light-colored lips and irises. He wears a light-colored tunic with a dark trim.
In the 1971 anime, Yōken is an anthropomorphic water buffalo with dark purple fur, small ears and a pair of gray horns. He wears a loose, magenta Chinese tunic with a black trim, a matching sash is tied at the waist, brown pants navy blue boots. His true form is that of a white fox.
In the 1985 anime, Yōken is an anthropomorphic water buffalo with dark blue fur, big ears and a pair dark gray horns. His lips are pale purple and his eyes have white sclerae, blue irises and black pupils. He wears a white tunic under a blue tunic with a light blue trim and yellow edges, a red sash is tied around his waist, yellow pants and brown boots.
In the 1996 anime, Yōken is an anthropomorphic water buffalo with black fur, big ears and a pair of dull brown horns. His lips are pink and his eyes have red sclerae, yellow irises and tiny black pupils. He wears a magenta tunic under a white tunic with a black trim, a black sash which is tied at the waist, yellow pants and a pair of black Chinese boots with red sides.
Yoken appeared in the third movie based on the third anime adaptation, GeGeGe no Kitarō: Saikyō Yōkai Gundan! Nippon Jōriku!!
Fire Breath: In the 1996 anime, Yōken is capable of releasing powerful streams of fire from his mouth.
Guandao: Yōken carries around a guandao, a type of Chinese spear. It has a gray pole with a tuft of red tassel tied by the spearhead, which is shape with a curved small protrusion on one-side and flat on the other. On the opposite end is a small gray hook-shaped piece.
- Mizuki's illustration of Yōken is a reuse of his illustration of the Ghost of Wolves.