Shizuha Aki is a minor youkai character from the Touhou Project series, known as the goddess of autumn leaves and the sister of Minoriko Aki. She appears as one of the stage 1 bosses in Mountain of Faith, where she helps establish the game’s autumn-themed atmosphere and the presence of the Aki sisters as seasonal gods. Shizuha is portrayed as quiet, reserved, and closely tied to the changing colors of fall foliage, serving more as a worldbuilding character than a major plot driver.