Demon

Demon (デーモン Dēmon) is a hidden recurring villain in 62studio's games, and one of the few devils. She only truly appears in the genocide routes of these games, though the player can find mentions of her throughout Lust Friend. The Record Keeper Fairy that appears throughout Lust Friend is actually her sealed form.

Appearance
Demon has pale skin, dark eyes, long white hair, two horns of different colours (black and white), and three pairs of tattered wings. She wears square-framed eyeglasses, a skimpy V-shaped piece of clothing, elbow-length gloves and knee-length boots.

Demon is drawn by the artist 森多史温 in Lust Friend, but has been drawn by 和砂糖 in later games.

Personality
Little is shown of Demon's personality, due to her limited screentime. However, she describes her purpose as being to destroy the succubus world. She considers the struggles of the succubi who sealed her to be amusing. She also shows herself to be highly manipulative, attempting to convince Magrut to commit genocide on the succubi.

Background
In the past, Demon was a powerful succubus who killed many other succubi and was a threat to the entire succubus world. After many years of struggling, she was defeated thanks to the combined efforts of Empress (the succubus queen) and her friends. However, they were only able to seal her into a weakened form, that of a fairy.

Lust Friend
Demon appears throughout the game in the form of the Record Keeper Fairy. She allows the player to save their progress. Her dialogue changes depending on the number of enemies the player has defeated, with numerous references to death. At one stage, it will by mostly obscured by boxes (■).

Eventually, the Record Keeper Fairy in Magrut's house will offer to give Magrut a special badge which allows him to permanently kill succubi, claiming that this will allow him to return home sooner. If Magrut proceeds to kill all of the other succubi in the world, Demon appears before him as a fairy (now named a "Save Fairy"), congratulates him for "clearing the game" and gives him the option of saving. Demon then reveals her true identity and explains that Magrut's actions have allowed her to break her seal. Additionally, she says that Magrut has fulfilled her goal of destroying the succubus world. She tells the player to close the game window, and can do this herself if the player tries to continue. If the player tries to reopen the game, they will be faced with Demon again, who offers to create a copy of the game world for them to continue playing in.

Succubus Puttel
If Azreth kills all of the succubi in the world, he ends up in a blank white space with Demon. Demon asks if he's still not satisfied after killing everyone and breaking the world. She tells the player that these events will repeat even if they try reloading. She then rapes Azreth, suffocating him with her breasts, and forcibly closes the game. Attempting to reload the save causes Demon to return Azreth to the point before he was suffocated. She offers to create a copy of the game world for the player to continue playing in.

Succubus in Wonderland
In the backstory to this game, Demon made a contract with the human woman Lorina. She gave Lorina immortality and another world to live in, making her into the Librarian of Space-Time. Later, Lorina's younger sister Alice also met Demon (who she knew only as "a beautiful white woman"). Demon comforted her, told her stories involving difficult words and gave her a magical Joker card. Alice said that jokers weren't cute, so Demon gave her a King of Diamonds card instead, sending her to the succubus-filled world of Wonderland.

Demon appears in a few places throughout the game world as a generic succubus NPC. Talking to her in a secret part of Mel Forest is one step in the genocide route.

If the player discards the game's card key items into a void in Proof Undersea Tunnel and then starts a new game with "アリス" (Alice) as their name, the world will be distorted and the player can eventually find Demon. She congratulates the player and then causes a fake ending screen, after which the screen turns black. Moving around will bring the player to a white room with Demon, now in her real appearance. She says that the cards were what allowed the existence of the succubi, she wrote this story with these cards as a medium, and that throwing the cards in the the voids in the world caused its destruction. She thanks the player for doing this, then adds that the history and relationships of the succubi in this world were due to her own modifications, and that everything in this world was created for the player to destroy. She offers to reward the player, giving a choice to surrender to her or quit the game. The former causes Demon to shrink Reto and rape him by pressing her against her breast.

LustGrimm Again
In this setting, Demon has been sealed away. She is indirectly responsible for the events of the game via her agent Demonia. Her role is mainly explained via a series of books in a strange space under the Succubus School. She chose Demonia to break her seal and allow her to take over a world created by Lust Reaper: the world of LustGrimm Again. Demonia was tasked with manipulating a certain human (Magrut) who would come to this world and defeat Lust Reaper's assistants, allowing the devil to take over the world. This devil was also the one to give her the name "Demonia" and an axe that could create holes leading to "different spaces" (apparently different worlds). These holes would be used to consume the world in the event that Demonia succeeded in her task.

Demon only appears in person in the game's genocide route. If Magrut enters the alternate game world of LustGrimm Dummy after fulfilling certain conditions, he can pass through a mysterious space with succubi who drain his Vigor on contact; these are alter egos of Demon, according to the Hatter. When he leaves this space, examining a sign allows Demon to communicate with him, asking him to hand over power if he desires the future's end. Doing so transports Magrut to the sealed Demon, who explains how she was sealed and wounded by her most hated enemy, but his power will let her escape and send that enemy into despair. The player is offered a choice of submitting to Demon or quitting the game, but regardless of what they pick (even if they manually close the game window), Demon overwrites every save file and and drains Magrut's power with a titjob.

Trivia

 * Demon appears to be inspired by Chara from the game Undertale, the latter being the inspiration for Lust Friend. Like Chara, Demon only appears if the player commits genocide on the game's enemies. Notably, at one point in Undertale, Chara is described as (emphasis added) "the demon that comes when people call its name".