Est

Est is a boss from the Collaboration Scenario. She comes from the game Succubus Quest, and is the final boss of the collaboration.

Biography
Est first appears when the White Rabbit comes back to the Paradox World after accidentally opening a portal to the wrong world. She reveals that she followed the White Rabbit in hope of finding another world, just like the legends told her.

The White Rabbit attempts to rebuke her, and Est bring her in her own world, the "Land of the Night". The White Rabbit attempts to attack her, but is unsuccessful, and Est tells her that Nightmares can't be attacked like that. She then countera-attack with a pleasure spell that cripples the White Rabbit to the latter's surprise. Having notice the White Rabbit's unusual powers over space-time, she decides to use them for her own pleasure and summon allies from other worlds with the intent to bring her "Land of Night" to the Paradox World.

She later appears in Chapter 12 of the Collaboration when the heroes got in to the portal that Daji provides for them before getting attacked by Nightmares. Est reveals herself to the heroes and fights them if they want to close the portal they must beat her. After defeating her for the first time she reveals that fighting her over and over again will only make her stronger and knocks out anyone who wasnt bearing the mark of the Proof of Collaboration, leaving the 7 heroes to fight Est for one last battle. After being defeated by the 7 heroes, the portal closed and reveals to them that she planned everything starting with the White Rabbit's power of summoning them and other monsters who allied themselves on expanding the Night Country for her own amusement. She later fled to Grand Noah Colloseum after she lost to the heroes. Later Daji mentions her and how they schemed on using the power of the White Rabbit and they discovered that controlling her will also allowed Daji to explore the realm of the White Rabbit which seems vague on explaining on what kind of enitity she is after being hijacked by her.