Succubi

Succubi are a race of all-female demons found throughout 62studio's games. 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 some exceptions (e.g. 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 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 can drain the life force of human men via their semen, and often rape them to feed on this (and, presumably, also to reproduce). They don't need to do this to survive, but they do need it to maintain their magical powers. Succubi vary in their treatment of their victims: some immediately drain them to death, some drain their victims non-lethally, and some keep humans as pets. However, humans a have a finite amount of life force and eventually die if a succubus drains it all.

While they typically attack human men, succubi will also attack women as well, both humans and other succubi. An example of the former is succubi attacking Chloe in Lust Memory, and an example of the latter is succubi attacking Lewis in Succubus in Wonderland. They can drain power from female victims as well as male, and can turn human women into more succubi.

Succubi mainly fight by bringing their opponent to orgasm, rendering them helpless. However, they can also be defeated through the same method.

Lust Series
Note: The following section includes information from untranslated sources, and is subject to change.

In this series, there is the human world (similar to real life Earth) and the succubus world. Most succubi live in the latter, but sometimes (as in the case of Lust Reaper) they cross over into the human world. There are also some human men in the succubus world, who are playthings for the succubi.

Lust Reaper admired the stories of humans and wanted to write her own. She therefore contacted the Brothers Grimm (hiding her true identity) with the intent of writing a story that would surpass theirs. However, she was obsessed with bad endings and her story was not recognised like those of the Grimms'. She wanted to express the beauty of bad endings to the world and therefore decided to rewrite one of the Grimms' stories. Her rewrite turned the story into another world for succubi, and she populated this by taking humans from their world and transforming the women into succubi. One of these women was Chloe, who was transformed into the succubus Manuve. The characters within the book were also affected, with Rotkappchen, the story's heroine, also becoming a succubus.

By the start of Lust Grimm, succubi controlled most of this world, with humans being restricted to a few towns (according to Primary). Not all succubi were hostile, as a few friendly ones coexisted with humans in the towns. Rotkappchen drew a male human named Magrut, the target of her love, into the world. Magrut eventually managed to defeat her and Lust Reaper, returning the story to its original state and freeing all the humans.

At some point, the powerful succubus Lust Nightmare was born out of the desires of Mea, a lonely human girl who wished for friends. She brought Mea to the succubus world, but the girl was still unable to find friends here. Lust Nightmare proceeded to destroy the succubus world and then rewind time, multiple times. This caused Empress, the leader of the succubi, to devise a plan to try to stop this destruction: she attempted to absorb the entire human world into the succubus world in an attempt to save the latter, which would make all the men food for succubi and transform the women into succubi.

As she needed him for her plan, Empress brought Magrut into the succubus world. Magrut was able to foil her plan, then go on to fight Lust Nightmare and befriend her, thus saving the succubus world.

Succubus Puttel
This game is set in a different world in which both humans and succubi exist, with the latter ruled by their queen, Bosewicht. At some point, Bosewicht began planning a party for succubi, in which many humans would be used as prey. Standing in the way of this was a succubus researcher who'd invented a necklace with the power to weaken succubi. Before this necklace could be mass-produced, Bosewicht sent Ella to abduct the researcher and his wife, leaving their young son Azreth behind, and then killed the couple. She also ordered Ella to act as an older sister for Azreth.

Some years later, Bosewicht ordered the succubi to conquer the world, taking over human settlements and bringing the humans to her castle for the party, and also had Ella return to her. However, Azreth set out in search of Ella, eventually managing to find and defeat Bosewicht.

Bosewicht had a backup plan involving three of her elite subordinates (Vampire, Hell Succubus and Queen Cow), who would bring despair to the few surviving humans. Azreth defeated these three and tracked down Bosewicht again, with the goal of saving Ella. Though he almost fell to the succubus queen's temptation, Azreth ultimately managed to defeat her with Ella's help. With Bosewicht's defeat, the succubi retreated and the humans began to rebuild.