Okabe’s Villa: A luxurious villa surrounded by shrines, gardens, and hidden passageways, hosting the annual masquerade.
Monastery Complex: Accessible via hidden corridors from the villa, with catacombs beneath it.
Catacombs: A secret underground complex, containing Okabe’s darkest secrets, including a hidden dragon’s egg.

Okabe (Tiefling Samurai): Respected leader and hidden villain, responsible for framing a Yokai for his crimes.
Mizuki (Tabaxi Ninja): Okabe’s close ally who persuaded him to conceal the massacre and helped to kill the Yokai.
Hisui (Yuan-ti Sorcerer): Once an accomplice, now filled with regret, hiding key information.
Suk (Aarakocra Monk): Found dead at the start of the adventure, her murder is the catalyst for the investigation.
Wukong (Monkey-like Trickster): A wildcard in the story, hosting gambling games but holding secrets of his own.

The Yokai: A spirit unjustly framed for murder, now seeking revenge.
Okabe’s Allies: Mizuki, his closest friend, and Hisui, who helped to kill the Yokai but now has doubts.
The Rakshasa: A scheming outsider who offers the PCs rewards if they retrieve a dragon egg hidden in the catacombs.

Elementals: Fire, Water, Air, and Earth Elementals guarding Okabe’s treasures.
Smoke Mephits: Mischievous creatures guarding secret areas.
Rakshasa: If crossed, becomes a powerful enemy.
Yokai: Depending on the PCs' choices, they may face the Yokai in a final battle.
Oriental Dragon: Imprisoned dragon with a calm and good nature that may be triggered to attack.