Fulbeua

Fulbeua Sina Lestani appears during "The Night Country and the Heroes of the Seven Worlds" She comes from the game Succubus Rhapsodia with Lauratt, Rigeo and Gilgorn.

She's a Nightmare. She's also a complete narcissist, only liking herself.

Biography
She first appears in chapter 5 in front of Lauratt, Rigeo and Magatsu. She reveals she's serving the Queen of Dreams simply to sate her ego. She also warns them that the Château des Romances will soon be brought to this world where Grand Noah is, as it was their plan since the beginning. She then invites the party to hunt her, and disappear.

She shows up again in chapter 8 as the boss and requires to take down a field generator to reach first. Kazuya and Hakunen's party end up facing her and manage to keep her at bay. A dissatisfied Musette appears to order Fulbeua to finish the heroes off, which the latter refuse while Musette fails to brainwash her. The party then proceeds to escape the room.

In chapter 10, when the alliance of the Queen of Dreams gather, she reveals that she does not care much about the latter's plans and intend to remain in the castle, only attacking the heroes should they show up.

In chapter 12, she indeed ends up being an obstacle, and the party is forced to fight her as she simply does not care for anything but her own comfort, even as the castle around her is half collapsed and swallowed by a space-time distortion by now. When the party beats her, she tells them that she'll remain there and wish them good luck with Est.

She can be recruited in the post collab by facing her once again, and will ask for "something more beautiful than her." The answer is to get the Mirror of Truth, an item used by Myusca, Nemea and Vinum in their own post-collab arc and acquired then. She will then join the party and gives Lauratt a rune to break Gilgorn's barrier and allow the party to attack the Demon Lord.

Monsterpedia entry
"A being who arrived from another world. Further Details are unknown."

First Battle

 * Price of Sinner
 * Melty Kiss
 * Romanus Teri: Aru
 * Romanus Teri: Eru
 * Melo Sophie: Dora
 * Energy Drain
 * Temptation
 * Passion Beat
 * Strelitzia: Alda



Chapter 8
A Nightmare boss, the major issue comes from your limited number of actually useful characters. Kazuya and Hakunen are limited to support roles, and even then only have a limited use. Otherwise, it's just a slog of spamming pleasure attacks, buffing and healing until she falls. Forget status effects, they don't work.

First and second Battle
Thankfully, with your whole party accessible, you can tailor your group to deal with her specifically. The fight itself remains the same boring slog of using pleasure attacks, buffing and healing up.

You have to fight her yet again with a +100 to all her stats after the collab to recruit her.