Dark Fess

Dark Fess (ダークフェッセ Dāku fesse) is a hidden boss in Lust Friend. She can only be encountered on the genocide route of the game.

Appearance
Dark Fess looks similar to the usual Fess, with long blonde hair tied into twintails, horns, bat-like wings and a spaded tail. However, her eyes are red instead of gold, and her clothing covers more of her body than Fess' clothing.

Personality
Dark Fess has a drastically different personality to Fess (or to Empress, the one controlling Fess for most of Lust Friend). Due to (almost) every other succubi being killed, she has fallen into despair and has given up on trying to save the succubus world. She considers herself responsible for Magrut's actions, as she was the one who brought him to this world. She wishes to break Magrut's will by killing him, again and again, until he (and thus the player) gives up on the game. Additionally, during her H-scene, she expresses a desire to destroy the human world after she's done with Magrut.

History
For Dark Fess to appear, Magrut must kill all of the succubi available in the game. Fess will confront Magrut, becoming Dark Fess, and attempt to kill him until he (and by extension the player) gives up. If Dark Fess is defeated, the game closes. Reopening the game does not allow the player to do anything other than fight Dark Fess again.

Strategy
Due to the nature of this boss, a strategy is meaningless.