Shinki is a powerful and enigmatic character in the Touhou Project series, specifically introduced as the final boss of 'Touhou 5: Mystic Square.' She is the goddess and creator of Makai, the demon world, and serves as its ruler. Shinki is known for her calm and motherly demeanor, yet she commands immense magical power and authority over demons. In the series, she primarily acts as an antagonist, challenging the protagonist and defending her world from intruders.