He Xuan is a Supreme-ranked ghost and one of the Four Great Calamities. He's best known as a powerful water demon who clawed his way to the top by devouring every other ghost trapped in the Kiln—a brutal origin story that shows why he earned his fearsome reputation.
What's interesting about He Xuan is how little he actually does with that power. Despite being Supreme level, he keeps to himself and rarely causes trouble, which is why most people barely know he exists. He's so under-the-radar that very few have ever actually seen him, so the celestial bureaucracy doesn't worry about him much.
His territory is the Black Water Demon Lair, a suitably creepy headquarters that's protected by a massive skeleton fish. The setup fits his vibe perfectly—mysterious, aquatic, and not exactly inviting visitors.
Content compiled by AnimeList.moe from publicly available sources.
