Night Sparrow Apparition.

"There's no human that doesn't fear me on night roads. If I wanted, I could call enough youkai here to eradicate every human on this land."

Mystia Lorelei (ミスティア・ローレライ Misutia Roorerai) is a night sparrow with an outgoing egocentric personality, at least she sounds arrogant, that enjoys infusing confusion and terror into the hearts of humans using her ability: a song that creates confusion in those who hear her. Her song seems to attract nearby monsters as well. She roams the Youkai Trail near the Human Village that Keine Kamishirasawa tries to protect, in search of humans to frighten. She is indeed feared by the locals as people around her become blinded by darkness. Some time later, along with Kyouko Kasodani, they formed a duo combination called Choujuu Gigaku.

She made her debut in Touhou 8: Imperishable Night as the stage 2 boss.