Flute Demon, Kimetsu no Yaiba Wiki

The Flute Demon (籥 (ふえ) 鬼 (おに) , Fue Oni?) was a demon exclusive to the Special One-Shot who desired to join the Twelve Kizuki. He was responsible for the deaths of a small group of Demon Slayers and innocent civilians. The Flute Demon takes the form of an elderly man with wrinkly skin, and incredibly long black downward-slanted eyebrows. He has long slanted eyes with thin slit pupils and pointed fangs, giving him a rather serpent-like appearance. His attire consisted of a flower-patterned katag

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