Fujiwara no Mokou is a major character in the Touhou Project series, known as a powerful immortal human living in the Bamboo Forest of the Lost. She is the daughter of the noble Fujiwara no Fuhito and gained immortality through the Hourai Elixir. Mokou is often portrayed as a fierce, independent, and hot-tempered fighter who frequently clashes with Kaguya Houraisan. Her role in the series centers on rivalry, resilience, and the burden of endless life.