Nightmare (SR)

Nightmare Battle Theme Nightmare (SR) is an enemy introduced in the Collab Scenario. She's summoned with the Château des Romances, and is a regular enemy in chapters 8,9,10, and 12. Like all Nightmares, she can only attack and be attacked with pleasure, and ignore any pleasure barriers.

She can only be recruited in chapter 12 and in the post-collab.

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

Attacks

 * Melty Kiss - One Foe, Pleasure Attribute, Horny (75%)
 * Succubus Hand Job - One Foe (M), Pleasure Attribute
 * Succubus Caress - One Foe (F), Pleasure Attribute
 * Succubus Fellatio - One Foe (M), Pleasure Attribute
 * Succubus Cunnilingus - One Foe (F), Pleasure Attribute
 * Succubus Paizuri - One Foe (M), Pleasure Attribute
 * Succubus Foot Job - One Foe (M), Pleasure Attribute
 * Push Down - One Foe (Luka), Bind (2 turns break)
 * Succubus Vagina - Rape One Foe (Luka, bound), Pleasure Attribute
 * Energy Drain - Rape One Foe (Luka, bound), Pleasure Attribute, Drain HP
 * Sweet Breath - All Foes, Auto Hit, Sleep (75%)

Strategy
The infamous gimmicky enemy of the collab, they are actually more annoying than threatening. Since only pleasure attacks work on Nightmares, your options to deal with her are extremely limited. You have to keep most of your active party with members able to dish out pleasure damages, as you will simply be forced to flee otherwise.

At an equal level, they have extremely low HP compared to other enemies. If you have a great party member to deal pleasure damages, focus on them first as they will fall extremely fast.

Additionally, Rigeo has access to the Elder Succubus race, which can learn Meltic Vore. Combining that with the many trance inflictors available at this point can be effective at ending any encounters with Nightmares quickly.