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Artist's commentary
"Good Day! Myouren Temple EX" EX-77: Wine, Tears, and Youkai 25
Fight dust.
Shurako, a term for dust floating in midair during a fighting or action scene. It can emphasize depth of space, the sense of speed and/or destructive force, character emotions, the passage of time, etc. Often, though, it's employed so the artist can omit background details.