Fujiwara no Mokou is a former ordinary human who became an immortal being after consuming the Hourai Elixir around 1300 years ago. She possesses the power of resurrection and ability to manipulate fire, often associated with phoenix-like imagery in her spell cards. Living in the Bamboo Forest of the Lost, she is known for her immortality and frequent danmaku battles, particularly with Kaguya Houraisan. Despite her canonical anti-social nature, fan depictions sometimes portray her as friendly toward humans or skilled in martial arts.