Succubi

Succubi are a race of all-female demons who dominate the world of Lust Grimm. They comprise all of the enemies and several of the other NPCs.

Description
Succubi resemble human women with various inhuman additions. The most common are horns, bat-like wings and a spaded tail, but some succubi instead have traits of various animals (e.g. Lamia, Harpy) or plants (Alraune). With the sole exception of the Nekomata, all succubi have breasts much larger than the average human woman. Succubi have a variety of hair colours that do not appear in humans, such as pink and blue (though since none of the human women in the game are illustrated, this might simply be part of a common trend in Japanese media). They often wear clothing that is revealing and/or fetishistic in nature, likely to better attract men.

Succubi have a taste for the semen of human men, and rape them to feed on this fluid and also to reproduce. Likely due to this, their predominant method of combat is to bring their opponent to orgasm and thus make them helpless. However, they can also be defeated through the same method.

Background
Succubi exist in the real world, with the only known example of this being Lust Reaper. She enjoyed the works of fiction produced by humans but was dissatisfied at their perceived lack of bad endings. She contacted the Brothers Grimm (hiding her true species) and attempted to write a story that surpassed theirs, but her story was not popular. Refusing to accept this, she chose one of the brothers' works, "Little Red Riding Hood", and rewrote it to suit her own tastes. She added succubi to the story, who then proceeded to overrun the world. Among the victims was the story's titular heroine Rotkäppchen, who was transformed into a succubus of incredible power. Rotkäppchen then proceeded to draw humans from the real world into the book, with women being transformed into more succubi on arrival.

By the time of the game's beginning, succubi control most of the world, with humans being restricted to a few towns (according to Primary). Not all succubi are hostile, as a few friendly ones coexist with humans in the towns.