Chiyari Tenkajin is a character from the Touhou Project series, appearing as a subterranean youkai associated with the Sanzu River and the animal realm. She is portrayed as a calm, somewhat detached figure who manages resources and information in the underground world. In Touhou, she serves as an encounter character and a minor antagonist during the events of the games, contributing to the setting’s conflict-driven but playful danmaku battles.