Byakuren Hijiri

"Namusan!"

- Buddhist remark, commonly used by her Byakuren Hijiri is a Buddhist monk sealed deep within Makai for helping youkai, she's the final boss of Touhou: Undefined Fantastic Object and a sworn enemy of Miko's clan. Though not innately evil, she's so naïve she represents a threat to the fine balance the protagonists, specially Reimu, have worked on setting between humans and youkai to ensure their well-being of everybody. Though her uncautiousness and motives are feared, she has the support of five youkai she helped and rescued before she was imprisoned.