A legendary Japanese Oni demon hunter with flowing black hair and crimson demon mask, leaping dramatically across ancient temple rooftops during a fierce summer thunderstorm at dusk, expressive fierce amber eyes with detailed lightning bolt reflections, cel-shaded with bold black outlines, dynamic battle composition with floating rain droplets and wind wisps, deep storm purple and bright electric blue lightning palette with magical stormy glow, fierce determined mood, scattered floating torn paper talisman wisps and distant mountain silhouette, Japanese folklore warrior concept art with soft bokeh of distant village lanterns and heavy rain curtains