Yin

Yin is a demon that appears in the animated film Demon City Shinjuku. She is one of the three demons that serves the sorcerer Rebi Ra, protecting him while he carries out the ritual that will open the gates between Earth and Hell.

During the film, Yin is confronted by the mysterious Mephisto while trying to assassinate the film's protagonist Kiyoya Izayoi. Yin lures Mephisto into a saloon and seemingly offers her body to him, but intends to kill him. Her arms and legs turn into long tentacles which she uses to bind Mephisto, but the mystic sticks her with a metallic dart that explodes, destroying one of her arm tentacles. Yin's arm quickly regrows and she attacks again, pinning Mephisto to the pool table. She drools acidic saliva, narrowly missing Mephisto's face. Mephisto manages to turn over, getting Yin on her back. He then reaches for a bottle of whiskey which he then stuffs into the demon harlot's mouth, triggering a reaction between the spirits and her acidic saliva which results in Yin's body exploding.

Abilities

 * Shapeshifting - Yin has limited shapeshifting abilities; she can appear as an attractive human woman, but ensnares her victims by turning her arms and legs into tentacles.
 * Levitation - In her true form, Yin can swim through the air freely.
 * Acid Saliva - Yin's saliva has the same properties as sulphuric acid and can dissolve most materials. This also proves to be her weakness as Mephisto kills her by forcing her to drink whiskey, which reacts explosively with the acid.
 * Regeneration - Yin is shown to be able to regrow lost limbs almost instantly.