Byakuren Hiziri is a significant character in the Touhou Project series, first appearing as the final boss of 'Undefined Fantastic Object.' She is a powerful Buddhist monk who advocates for peace and equality between humans and youkai. As the head of the Myouren Temple, Byakuren is revered for her compassion, wisdom, and magical abilities. Her role in the series often revolves around mediating conflicts and guiding others towards mutual understanding, making her a central figure in promoting harmony within Gensokyo.