Shoujo no Onryou

In the Touhou Project, "Shoujo no Onryou" (少女の怨霊), which translates to "Maiden's Vengeful Spirit," refers to a special type of ghost. When a person dies, they must wait at the Sanzu River for a shinigami to ferry them across. However, if a youkai steals their body before they cross the river, that person becomes a vengeful spirit. Unlike normal ghosts and phantoms, vengeful spirits are hot to the touch. These vengeful spirits often take on non-human forms and are a threat to both humans and youkai within the Touhou world. For example, in "Subterranean Animism," they appear as cats supporting the boss character Rin Kaenbyou. They also feature in other works like "Shoot the Bullet" and "Wild and Horned Hermit." Vengeful spirits are typically depicted as souls harboring strong grudges and possess special abilities due to their unusual formation. They're a key part of the Touhou Project, adding a unique and eerie element to its fantasy world.